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CAPE CANAVERAL, Fla. -- During a simulated launch countdown on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, left, and Michael Barratt are strapped into their seats on space shuttle Discovery. Next, they will practice escaping the shuttle, in preparation for an unlikely emergency at the pad on launch day. The simulated launch countdown and emergency exit training are part of a week-long Terminal Countdown Demonstration Test (TCDT). Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5204

CAPE CANAVERAL, Fla. -- During a simulated launch countdown on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, left, and Michael Barratt are strapped into the More

CAPE CANAVERAL, Fla. - Space shuttle Discovery's main landing gear touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 13-days in space, completing the 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Linda Perry KSC-2011-2083

CAPE CANAVERAL, Fla. - Space shuttle Discovery's main landing gear touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 13-days in space, completing the 5.3- More

CAPE CANAVERAL, Fla. -- Space shuttle Discovery's main landing gear touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 13-days in space, completing the 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Ben Cooper KSC-2011-2085

CAPE CANAVERAL, Fla. -- Space shuttle Discovery's main landing gear touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 13-days in space, completing the 5.3 More

CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center, STS-133 crew members receive instruction on the operation of the pad's slidewire basket system emergency exit training as part of the Terminal Countdown Demonstration Test (TCDT). From left are Mission Specialist Alvin Drew, Pilot Eric Boe, Mission Specialist Tim Kopra, Commander Steve Lindsey, and Mission Specialists Nicole Stott and Michael Barratt. TCDT provides each shuttle crew and launch team an opportunity to participate in various simulated activities, including equipment familiarization and a launch countdown. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5164

CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center, STS-133 crew members receive instruction on the operation of the pad's slidewire basket system emergency exit training as part of the Te More

CAPE CANAVERAL, Fla. – In Orbiter Processing Facility 3 at NASA's Kennedy Space Center in Florida, STS-128 Mission Specialists Nicole Stott and John "Danny" Olivas practice with a camera they will use on their upcoming STS-128 mission. The crew is at Kennedy for a crew equipment interface test, or CEIT, which provides hands-on training and observation of shuttle and flight hardware. The STS-128 flight will carry science and storage racks to the International Space Station on Discovery. Launch is targeted for Aug. 7. Photo credit: NASA/Jim Grossmann KSC-2009-3597

CAPE CANAVERAL, Fla. – In Orbiter Processing Facility 3 at NASA's Kennedy Space Center in Florida, STS-128 Mission Specialists Nicole Stott and John "Danny" Olivas practice with a camera they will use on their More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members get instructions about using slidewire baskets for emergency exit from the fixed service structure on Launch Pad 39A. From left are Mission Specialist Patrick Forrester, Commander Rick Sturckow, Mission Specialists Nicole Stott and Jose Hernandez, and Pilot Kevin Ford. The crew is at Kennedy for a launch dress rehearsal called the terminal countdown demonstration test, or TCDT, which includes emergency exit training and equipment familiarization, as well as a simulated launch countdown. Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Photo credit: NASA/Kim Shiflett KSC-2009-4502

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members get instructions about using slidewire baskets for emergency exit from the fixed service structure on Launch Pad 39A. Fro More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members gather near Launch Pad 39A to answer questions from the media. From left are Mission Specialists Nicole Stott and John "Danny" Olivas, Commander Rick Sturckow, Pilot Kevin Ford and Mission Specialists Patrick Forrester, Jose Hernandez and Christer Fuglesang, who represents the European Space Agency. On the pad behind them is seen the solid rocket boosters and external fuel tank of space shuttle Discovery. The crew is at Kennedy for a launch dress rehearsal called the terminal countdown demonstration test, or TCDT, which includes emergency exit training and equipment familiarization, as well as a simulated launch countdown. Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Photo credit: NASA/Kim Shiflett KSC-2009-4485

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members gather near Launch Pad 39A to answer questions from the media. From left are Mission Specialists Nicole Stott and John "Dan More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members get instructions about emergency exit procedures from the fixed service structure on Launch Pad 39A. From left are Mission Specialists Nicole Stott, John "Danny" Olivas, Christer Fuglesang and Patrick Forrester, and Commander Rick Sturckow. Fuglesang represents the European Space Agency. The crew is at Kennedy for a launch dress rehearsal called the terminal countdown demonstration test, or TCDT, which includes emergency exit training and equipment familiarization, as well as a simulated launch countdown. Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Photo credit: NASA/Kim Shiflett KSC-2009-4499

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members get instructions about emergency exit procedures from the fixed service structure on Launch Pad 39A. From left are Mission More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members gather near Launch Pad 39A to answer questions from the media. From left are Mission Specialists Nicole Stott and John "Danny" Olivas, Commander Rick Sturckow, Pilot Kevin Ford and Mission Specialists Patrick Forrester, Jose Hernandez and Christer Fuglesang, who represents the European Space Agency. On the pad behind them is seen the solid rocket boosters and external fuel tank of space shuttle Discovery. On top of the fixed service structure at right is the 80-foot-tall lightning mast. The crew is at Kennedy for a launch dress rehearsal called the terminal countdown demonstration test, or TCDT, which includes emergency exit training and equipment familiarization, as well as a simulated launch countdown. Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Photo credit: NASA/Kim Shiflett KSC-2009-4486

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members gather near Launch Pad 39A to answer questions from the media. From left are Mission Specialists Nicole Stott and John "Dan More

CAPE CANAVERAL, Fla. – The STS-128 crew members gather on the 225-foot level of NASA Kennedy Space Center's fixed service structure. From left are Commander Rick Sturckow, Mission Specialists Danny Olivas and Christer Fuglesang, Pilot Kevin Ford and Mission Specialists Nicole Stott, Patrick Forrester and Jose Hernandez. Mission crew members are at Kennedy to take part in the terminal countdown demonstration test, or TCDT, which includes emergency exit training and culminates in the simulated countdown. On the STS-128 mission, Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Launch is targeted for late August. Photo credit: NASA/Kim Shiflett KSC-2009-4554

CAPE CANAVERAL, Fla. – The STS-128 crew members gather on the 225-foot level of NASA Kennedy Space Center's fixed service structure. From left are Commander Rick Sturckow, Mission Specialists Danny Olivas and More

CAPE CANAVERAL, Fla. – In In the Payload Changeout Room on NASA Kennedy Space Center's Launch Pad 39A, STS-128 crew members relax after looking over the payloads to be installed in space shuttle Discovery. At left is Mission Specialist Patrick Forrester; at center is Pilot Kevin Ford; at right are Mission Specialists Nicole Stott and Danny Olivas. The crew is at Kennedy to take part in the terminal countdown demonstration test, or TCDT, which includes equipment familiarization, emergency exit training and a simulated countdown. On the STS-128 mission, Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Launch is targeted for late August. Photo credit: NASA/Kim Shiflett KSC-2009-4558

CAPE CANAVERAL, Fla. – In In the Payload Changeout Room on NASA Kennedy Space Center's Launch Pad 39A, STS-128 crew members relax after looking over the payloads to be installed in space shuttle Discovery. At l More

CAPE CANAVERAL, Fla. – The STS-128 crew members gather on the 225-foot level of NASA Kennedy Space Center's fixed service structure. From left are Commander Rick Sturckow, Mission Specialists Danny Olivas and Christer Fuglesang, Pilot Kevin Ford and Mission Specialists Nicole Stott, Patrick Forrester and Jose Hernandez. Mission crew members are at Kennedy to take part in the terminal countdown demonstration test, or TCDT, which includes emergency exit training and culminates in the simulated countdown. On the STS-128 mission, Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Launch is targeted for late August. Photo credit: NASA/Kim Shiflett KSC-2009-4553

CAPE CANAVERAL, Fla. – The STS-128 crew members gather on the 225-foot level of NASA Kennedy Space Center's fixed service structure. From left are Commander Rick Sturckow, Mission Specialists Danny Olivas and More

CAPE CANAVERAL, Fla. – In the Payload Changeout Room on NASA Kennedy Space Center's Launch Pad 39A, STS-128 crew members take a close look at the payloads to be installed in space shuttle Discovery. Seen here are Mission Specialists Nicole Stott (left) and Christer Fuglesang (right). The crew is at Kennedy to take part in the terminal countdown demonstration test, or TCDT, which includes equipment familiarization, emergency exit training and a simulated countdown. On the STS-128 mission, Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Launch is targeted for late August. Photo credit: NASA/Kim Shiflett KSC-2009-4556

CAPE CANAVERAL, Fla. – In the Payload Changeout Room on NASA Kennedy Space Center's Launch Pad 39A, STS-128 crew members take a close look at the payloads to be installed in space shuttle Discovery. Seen here a More

CAPE CANAVERAL, Fla. – The astronauts for space shuttle Discovery’s STS-128 mission address the media on hand to witness their arrival at Kennedy Space Center’s Shuttle Landing Facility. The crew arrived aboard the NASA Shuttle Training Aircraft, a modified Gulfstream II jet, at 6:34 p.m. EDT. From left are Mission Specialists Nicole Stott who will remain on the International Space Station as flight engineer for Expedition 20, Swedish astronaut Christer Fuglesang of the European Space Agency, John "Danny" Olivas, Jose Hernandez, and Patrick Forrester; Pilot Kevin Ford; and Commander Rick Sturckow, at microphone. The crew has returned to Kennedy to prepare for launch on Aug. 25 at 1:36 a.m. EDT. The 13-day mission will deliver a new crew member and 33,000 pounds of equipment to the International Space Station. The equipment includes science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Photo credit: NASA/Kim Shiflett KSC-2009-4774

CAPE CANAVERAL, Fla. – The astronauts for space shuttle Discovery’s STS-128 mission address the media on hand to witness their arrival at Kennedy Space Center’s Shuttle Landing Facility. The crew arrived aboar More

CAPE CANAVERAL, Fla. – The astronauts for space shuttle Discovery’s STS-128 mission address the media on hand to witness their arrival at Kennedy Space Center’s Shuttle Landing Facility. The crew arrived aboard the NASA Shuttle Training Aircraft, a modified Gulfstream II jet, at 6:34 p.m. EDT. From left are Mission Specialists Nicole Stott who will remain on the International Space Station as flight engineer for Expedition 20, Swedish astronaut Christer Fuglesang of the European Space Agency, John "Danny" Olivas (at microphone), Jose Hernandez, and Patrick Forrester; Pilot Kevin Ford; and Commander Rick Sturckow. The crew has returned to Kennedy to prepare for launch on Aug. 25 at 1:36 a.m. EDT. The 13-day mission will deliver a new crew member and 33,000 pounds of equipment to the International Space Station. The equipment includes science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Photo credit: NASA/Kim Shiflett KSC-2009-4777

CAPE CANAVERAL, Fla. – The astronauts for space shuttle Discovery’s STS-128 mission address the media on hand to witness their arrival at Kennedy Space Center’s Shuttle Landing Facility. The crew arrived aboar More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members pose for the traditional portrait on launch day. From left are Mission Specialists Nicole Stott, Christer Fuglesang, John "Danny" Olivas, Jose Hernandez, and Patrick Forrester; Pilot Kevin Ford; and Commander Rick Sturckow. Next, the crew will suit up and then head to the Astrovan for the 3.4-mile drive to Launch Pad 39A. Liftoff aboard space shuttle Discovery is scheduled for 1:36 a.m. EDT Aug. 25. The 13-day mission will deliver more than 7 tons of supplies, science racks and equipment, as well as additional environmental hardware to sustain six crew members on the International Space Station. The equipment includes a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. The mission is the 128th in the Space Shuttle Program, the 37th flight of Discovery and the 30th station assembly flight. Photo credit: NASA/Kim Shiflett KSC-2009-4820

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-128 crew members pose for the traditional portrait on launch day. From left are Mission Specialists Nicole Stott, Christer Fuglesang, John " More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Pilot Eric Boe (left); Mission Specialists Nicole Stott, Alvin Drew and Michael Barratt greet each other after their arrival at the Shuttle Landing Facility. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/shuttle. Photo credit: NASA/Kim Shiflett KSC-2010-5081

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Pilot Eric Boe (left); Mission Specialists Nicole Stott, Alvin Drew and Michael Barratt greet each other after their arrival at the Shu More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey speaks to the media gathered for his crew’s arrival at the Shuttle Landing Facility. From left are Mission Specialists Nicole Stott, Michael Barratt; Pilot Eric Boe and Mission Specialists Tim Kopra and Alvin Drew. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/shuttle. Photo credit: NASA/Kim Shiflett KSC-2010-5082

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey speaks to the media gathered for his crew’s arrival at the Shuttle Landing Facility. From left are Mission Spec More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the STS-133 crew poses for a group portrait following their arrival for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT). From left are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra, Alvin Drew; Pilot Eric Boe and Commander Steve Lindsey. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/shuttle. Photo credit: NASA/Kim Shiflett KSC-2010-5085

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the STS-133 crew poses for a group portrait following their arrival for a practice launch dress rehearsal called the Terminal Countdown Demonst More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the STS-133 crew poses for a group portrait following their arrival for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT). From left are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra, Alvin Drew; Pilot Eric Boe and Commander Steve Lindsey. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/shuttle. Photo credit: NASA/Jack Pfaller KSC-2010-5075

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the STS-133 crew poses for a group portrait following their arrival for a practice launch dress rehearsal called the Terminal Countdown Demonst More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 crew members pose for a photo in Launch Pad 39A's White Room during the Terminal Countdown Demonstration Test (TCDT). From left are Mission Specialists Nicole Stott, Alvin Drew, Pilot Eric Boe, Mission Specialists Tim Kopra and Michael Barratt, and Commander Steve Lindsey. TCDT provides each shuttle crew and launch team an opportunity to participate in various simulated activities, including equipment familiarization and a launch countdown. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5159

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 crew members pose for a photo in Launch Pad 39A's White Room during the Terminal Countdown Demonstration Test (TCDT). From left are Mis More

CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center, STS-133 crew members receive instruction on the operation of the pad's slidewire basket system emergency exit training as part of the Terminal Countdown Demonstration Test (TCDT). Inside the basket are Mission Specialists Nicole Stott, left, and Michael Barratt. TCDT provides each shuttle crew and launch team an opportunity to participate in various simulated activities, including equipment familiarization and a launch countdown. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5162

CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center, STS-133 crew members receive instruction on the operation of the pad's slidewire basket system emergency exit training as part of the Te More

CAPE CANAVERAL, Fla. -- At Launch Pad 39A at NASA's Kennedy Space Center in Florida, members of the STS-133 crew receive instruction in the pad's bunker as part of the Terminal Countdown Demonstration Test (TCDT) emergency exit training. From left are Commander Steve Lindsey, Mission Specialists Nicole Stott, Michael Barratt and Alvin Drew, Pilot Eric Boe, and Mission Specialist Tim Kopra. TCDT provides each shuttle crew and launch team an opportunity to participate in various simulated activities, including equipment familiarization and a launch countdown. Space shuttle Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5167

CAPE CANAVERAL, Fla. -- At Launch Pad 39A at NASA's Kennedy Space Center in Florida, members of the STS-133 crew receive instruction in the pad's bunker as part of the Terminal Countdown Demonstration Test (TCD More

CAPE CANAVERAL, Fla. -- During a simulated launch countdown on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, left, and Michael Barratt are strapped into their seats on space shuttle Discovery. Next, they will practice escaping the shuttle, in preparation for an unlikely emergency at the pad on launch day. The simulated launch countdown and emergency exit training are part of a week-long Terminal Countdown Demonstration Test (TCDT). Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5206

CAPE CANAVERAL, Fla. -- During a simulated launch countdown on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, left, and Michael Barratt are strapped into the More

CAPE CANAVERAL, Fla. -- During a simulated launch countdown on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, left, and Michael Barratt are strapped into their seats on space shuttle Discovery. Next, they will practice escaping the shuttle, in preparation for an unlikely emergency at the pad on launch day. The simulated launch countdown and emergency exit training are part of a week-long Terminal Countdown Demonstration Test (TCDT). Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5205

CAPE CANAVERAL, Fla. -- During a simulated launch countdown on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, left, and Michael Barratt are strapped into the More

CAPE CANAVERAL, Fla. -- During a simulated launch countdown, the STS-133 crew walks out of the Operations and Checkout Building to the waiting Astrovan at NASA's Kennedy Space Center in Florida. From left are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra and Alvin Drew, Pilot Eric Boe, and Commander Steve Lindsey. Stott, a former Kennedy employee, waves to workers who are cheering for her. As part of the Terminal Countdown Demonstration Test (TCDT), the crew members ride to the pad in their silver Astrovan and strap into space shuttle Discovery to practice the steps that will be taken on launch day. Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5192

CAPE CANAVERAL, Fla. -- During a simulated launch countdown, the STS-133 crew walks out of the Operations and Checkout Building to the waiting Astrovan at NASA's Kennedy Space Center in Florida. From left are M More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 crew poses for a group photo on the Shuttle Landing Facility runway after arriving aboard T-38 training jets. From left are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra and Alvin Drew, Pilot Eric Boe, and Commander Steve Lindsey. In the days leading up to their launch to the International Space Station, the crew members will check the fit of their launch-and-entry suits, review launch-day procedures, receive weather briefings and remain medically quarantined to prevent sickness. Scheduled to lift off Nov. 1 at 4:40 p.m., Discovery and crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Jack Pfaller KSC-2010-5354

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 crew poses for a group photo on the Shuttle Landing Facility runway after arriving aboard T-38 training jets. More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 crew members pose for a group photo on the Shuttle Landing Facility runway following their arrival aboard T-38 training jets. From left, are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra and Alvin Drew, Pilot Eric Boe, and Commander Steve Lindsey. Scheduled to lift off Nov. 1 at 4:40 p.m., Discovery and crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2010-5352

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 crew members pose for a group photo on the Shuttle Landing Facility runway following their arrival aboard T-3 More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 crew addresses the media on the Shuttle Landing Facility runway after arriving aboard T-38 training jets. From left are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra and Alvin Drew, Pilot Eric Boe, and Commander Steve Lindsey. Flying high above the crew is an F-15, participating in an Air Force Week celebration at the center's Visitor Complex. In the days leading up to their launch to the International Space Station, the crew members will check the fit of their launch-and-entry suits, review launch-day procedures, receive weather briefings and remain medically quarantined to prevent sickness. Scheduled to lift off Nov. 1 at 4:40 p.m., Discovery and crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Jack Pfaller KSC-2010-5353

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 crew addresses the media on the Shuttle Landing Facility runway after arriving aboard T-38 training jets. Fro More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 pose for a photo on the Shuttle Landing Facility runway after arriving in T-38 jets. From left, are Mission Specialists Nicole Stott, Michael Barratt, Steve Bowen and Alvin Drew, Pilot Eric Boe, and Commander Steve Lindsey. In the days leading up to their launch to the International Space Station, the crew members will check the fit of their launch-and-entry suits, review launch-day procedures, receive weather briefings and remain medically quarantined to prevent sickness. This will be the second launch attempt for Discovery's crew, following a scrub in November 2010 due to a hydrogen gas leak at the ground umbilical carrier plate (GUCP) as well as modifications to the external fuel tank's intertank support beams, called stringers. Scheduled to lift off Feb. 24 at 4:50 p.m. EST, Discovery and its crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2011-1515

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 pose for a photo on the Shuttle Landing Facility runway after arriving in T-38 jets. From left, are Mission S More

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 astronauts, dressed in their orange launch-and-entry suits, wave to news media representatives and other spectators as they walk out of the Operations and Checkout Building towards the Astrovan, which will transport them to Launch Pad 39A. From back row left, are Mission Specialists Nicole Stott, Michael Barratt, middle row left, Mission Specialists Alvin Drew and Steve Bowen; front row left, Pilot Eric Boe; and Commander Steve Lindsey. Discovery and its six-member crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Discovery, which will fly its 39th mission, is scheduled to be retired following STS-133. This will be the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Kim Shiflett KSC-2011-1605

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 astronauts, dressed in their orange launch-and-entry suits, wave to news media representatives and other spec More

CAPE CANAVERAL, Fla. -- At the Operations and Checkout Building at NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 astronauts, dressed in their orange launch-and-entry suits, pause for a group portrait in front of the Astrovan which will transport them to Launch Pad 39A. From left are Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen; Pilot Eric Boe; and Commander Steve Lindsey. Discovery and its six-member crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Discovery, which will fly its 39th mission, is scheduled to be retired following STS-133. This will be the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Jim Grossmann KSC-2011-1607

CAPE CANAVERAL, Fla. -- At the Operations and Checkout Building at NASA's Kennedy Space Center in Florida, space shuttle Discovery's STS-133 astronauts, dressed in their orange launch-and-entry suits, pause for More

CAPE CANAVERAL, Fla. - Space shuttle Discovery, its drag chute unfurled, appears to be a mirage as it travels down Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tony Gray and Tom Farrar KSC-2011-2103

CAPE CANAVERAL, Fla. - Space shuttle Discovery, its drag chute unfurled, appears to be a mirage as it travels down Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery' More

CAPE CANAVERAL, Fla. -- On the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey talks to media representatives about space shuttle Discovery's final spaceflight mission. Behind Lindsey, from left, are Mission Specialists Nicole Stott and Michael Barratt, Pilot Eric Boe, and Mission Specialists Alvin Drew and Steve Bowen. The STS-133 crew returned to Earth at 11:57 a.m. on Runway 15, completing a 13-day, 5.3-million-mile mission to the International Space Station. STS-133 delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Kim Shiflett KSC-2011-2145

CAPE CANAVERAL, Fla. -- On the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey talks to media representatives about space shuttle Discovery's final spacefligh More

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to be a mirage as it jettisons its drag chute on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tony Gray and Tom Farrar KSC-2011-2104

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to be a mirage as it jettisons its drag chute on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final ret More

CAPE CANAVERAL, Fla. - Space shuttle Discovery's drag chute deploys on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tim Powers KSC-2011-2093

CAPE CANAVERAL, Fla. - Space shuttle Discovery's drag chute deploys on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-d More

CAPE CANAVERAL, Fla. -- Space shuttle Discovery glides above Runway 15 before touching down at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Chad Baumer KSC-2011-2089

CAPE CANAVERAL, Fla. -- Space shuttle Discovery glides above Runway 15 before touching down at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing t More

CAPE CANAVERAL, Fla. - Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Kim Shiflett KSC-2011-2060

CAPE CANAVERAL, Fla. - Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 m More

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to be a mirage as it makes its way down Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tony Gray and Tom Farrar KSC-2011-2105

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to be a mirage as it makes its way down Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from More

CAPE CANAVERAL, Fla. -- Streams of smoke trail from the main landing gear tires as space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Chad Baumer KSC-2011-2090

CAPE CANAVERAL, Fla. -- Streams of smoke trail from the main landing gear tires as space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. La More

CAPE CANAVERAL, Fla. - Streams of smoke trail from the main landing gear tires as space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 13-days in space, completing the 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Linda Perry KSC-2011-2082

CAPE CANAVERAL, Fla. - Streams of smoke trail from the main landing gear tires as space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida afte More

CAPE CANAVERAL, Fla. - NASA Kennedy Space Center workers watch as space shuttle Discovery rolls to a stop on Runway 15 at the Shuttle Landing Facility in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Jack Pfaller KSC-2011-2063

CAPE CANAVERAL, Fla. - NASA Kennedy Space Center workers watch as space shuttle Discovery rolls to a stop on Runway 15 at the Shuttle Landing Facility in Florida. Landing was at 11:57 a.m. EST, completing the 1 More

CAPE CANAVERAL, Fla. -- NASA Administrator Charlie Bolden introduces the STS-133 crew to media representatives waiting on the Shuttle Landing Facility at Kennedy Space Center in Florida to hear statements about space shuttle Discovery's final spaceflight mission. Crew members, from left, are Mission Specialists Nicole Stott and Michael Barratt, Commander Steve Lindsey, Pilot Eric Boe and Mission Specialists Alvin Drew and Steve Bowen. The crew returned to Earth at 11:57 a.m. on Runway 15, completing a 13-day, 5.3-million-mile mission to the International Space Station. STS-133 delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Kim Shiflett KSC-2011-2142

CAPE CANAVERAL, Fla. -- NASA Administrator Charlie Bolden introduces the STS-133 crew to media representatives waiting on the Shuttle Landing Facility at Kennedy Space Center in Florida to hear statements about More

CAPE CANAVERAL, Fla. - Space shuttle Discovery closes its 39-mission career with touch down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Sandra Joseph and Kevin O'Connell KSC-2011-2099

CAPE CANAVERAL, Fla. - Space shuttle Discovery closes its 39-mission career with touch down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from More

CAPE CANAVERAL, Fla. - Space shuttle Discovery's drag chute deploys on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tim Powers KSC-2011-2094

CAPE CANAVERAL, Fla. - Space shuttle Discovery's drag chute deploys on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-d More

CAPE CANAVERAL, Fla. - Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Kim Shiflett KSC-2011-2059

CAPE CANAVERAL, Fla. - Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 m More

CAPE CANAVERAL, Fla. -- Space shuttle Discovery glides above Runway 15 before touching down at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Rusty Backer KSC-2011-2087

CAPE CANAVERAL, Fla. -- Space shuttle Discovery glides above Runway 15 before touching down at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing t More

CAPE CANAVERAL, Fla. -- With its drag chute unfurled, space shuttle Discovery rolls down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tim Terry and Mike Kerley KSC-2011-2066

CAPE CANAVERAL, Fla. -- With its drag chute unfurled, space shuttle Discovery rolls down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, co More

CAPE CANAVERAL, Fla. -- The nose gear on space shuttle Discovery descends in anticipation of touch down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Sandra Joseph and Kevin O'Connell KSC-2011-2100

CAPE CANAVERAL, Fla. -- The nose gear on space shuttle Discovery descends in anticipation of touch down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final More

CAPE CANAVERAL, Fla. -- Space shuttle Discovery glides above Runway 15 before touching down at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Rusty Backer KSC-2011-2088

CAPE CANAVERAL, Fla. -- Space shuttle Discovery glides above Runway 15 before touching down at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing t More

CAPE CANAVERAL, Fla. -- Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tom Farrar KSC-2011-2068

CAPE CANAVERAL, Fla. -- Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 More

CAPE CANAVERAL, Fla. - NASA managers participate in a post-landing media briefing at NASA's Kennedy Space Center in Florida following the completion of the STS-133 mission. From left are Allard Beutel, NASA Public Affairs; Bill Gerstenmaier, associate administrator for Space Operations; Mike Moses, space shuttle launch integration manager; and Mike Leinbach, shuttle launch director. Space shuttle Discovery's final return from space on Runway 15 at Kennedy's Shuttle Landing Facility completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Jack Pfaller KSC-2011-2109

CAPE CANAVERAL, Fla. - NASA managers participate in a post-landing media briefing at NASA's Kennedy Space Center in Florida following the completion of the STS-133 mission. From left are Allard Beutel, NASA Pub More

CAPE CANAVERAL, Fla. -- Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tom Farrar KSC-2011-2067

CAPE CANAVERAL, Fla. -- Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 More

CAPE CANAVERAL, Fla. -- Streams of smoke trail from the main landing gear tires as space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 13-days in space, completing the 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Ben Cooper KSC-2011-2084

CAPE CANAVERAL, Fla. -- Streams of smoke trail from the main landing gear tires as space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida aft More

CAPE CANAVERAL, Fla. - Space shuttle Discovery's main landing gear tires are down as the spacecraft approaches Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Linda Perry KSC-2011-2081

CAPE CANAVERAL, Fla. - Space shuttle Discovery's main landing gear tires are down as the spacecraft approaches Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's fi More

CAPE CANAVERAL, Fla. -- The STS-133 crew poses for a photo in front of space shuttle Discovery on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida. From left, are Mission Specialists Nicole Stott and Michael Barratt, Pilot Eric Boe, Commander Steve Lindsey, and Mission Specialists Alvin Drew and Steve Bowen. Discovery and crew returned to Earth at 11:57 a.m., completing a 13-day, 5.3-million-mile mission to the International Space Station. STS-133 delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Kim Shiflett KSC-2011-2147

CAPE CANAVERAL, Fla. -- The STS-133 crew poses for a photo in front of space shuttle Discovery on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida. From left, are Mission Speci More

CAPE CANAVERAL, Fla. -- On the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey talks to media representatives about space shuttle Discovery's final spaceflight mission. Behind Lindsey, from left, are Mission Specialists Nicole Stott and Michael Barratt, Pilot Eric Boe, Mission Specialists Alvin Drew and Steve Bowen, and NASA Administrator Charlie Bolden. The STS-133 crew returned to Earth at 11:57 a.m. on Runway 15, completing a 13-day, 5.3-million-mile mission to the International Space Station. STS-133 delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Kim Shiflett KSC-2011-2143

CAPE CANAVERAL, Fla. -- On the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey talks to media representatives about space shuttle Discovery's final spacefligh More

CAPE CANAVERAL, Fla. - The nose gear on space shuttle Discovery descends to support touch down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Sandra Joseph and Kevin O'Connell KSC-2011-2101

CAPE CANAVERAL, Fla. - The nose gear on space shuttle Discovery descends to support touch down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return fr More

CAPE CANAVERAL, Fla. -- Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 mission to the International Space Station. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Chuck Tintera KSC-2011-2070

CAPE CANAVERAL, Fla. -- Space shuttle Discovery touches down on Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 11:57 a.m. EST, completing the 13-day STS-133 More

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to be a mirage as it coasts down Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space completed the 13-day, 5.3-million-mile STS-133 mission. Main gear touchdown was at 11:57:17 a.m., followed by nose gear touchdown at 11:57:28, and wheelstop at 11:58:14 a.m. On board are Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery and its six-member crew delivered the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the orbiting outpost. STS-133 was Discovery's 39th and final mission. This was the 133rd Space Shuttle Program mission and the 35th shuttle voyage to the space station. Photo credit: NASA/Tony Gray and Tom Farrar KSC-2011-2106

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to be a mirage as it coasts down Runway 15 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Discovery's final return from space c More

CAPE CANAVERAL, Fla. -- In the Training Auditorium at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, Alvin Drew and Steve Bowen autograph their formal portraits for Kennedy employees during a crew return event. The crew launched from Kennedy's Launch Pad 39A aboard space shuttle Discovery on its final flight on February 24, 2011 to the International Space Station. The crew delivered Robonaut 2 and the Permanent Multipurpose Module packed with supplies and critical spare parts on a 13-day mission. Discovery is being processed for retirement and will be displayed at the National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Va. Photo credit: NASA/Kim Shiflett KSC-2011-2942

CAPE CANAVERAL, Fla. -- In the Training Auditorium at NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott, Alvin Drew and Steve Bowen autograph their formal portraits for Kennedy em More

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, STS-133 Pilot Eric Boe talks to media representatives with NASA T-38 jets in the background. Boe was a member of the crew to fly on Discovery’s final mission in February and March 2011. Other members of the STS-133 crew were Commander Steve Lindsey, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery is scheduled to depart from Kennedy for the final time tomorrow morning on the back of a Shuttle Carrier Aircraft. Also known as an SCA, the aircraft is a Boeing 747 jet, originally manufactured for commercial use, which was modified by NASA to transport the shuttles between destinations on Earth. The SCA designated NASA 905 is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Tim Jacobs KSC-2012-2297

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, STS-133 Pilot Eric Boe talks to media representatives with NASA T-38 jets in the background. Boe was a member o More

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott and Michael Barratt pose for a photographer in front of a Shuttle Carrier Aircraft on which space shuttle Discovery has been secured for departure. Stott and Barratt were members of the crew to fly on Discovery’s final mission in February and March 2011. Other members of the STS-133 crew were Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Alvin Drew and Steve Bowen. Discovery is scheduled to depart from Kennedy for the final time tomorrow morning. Also known as an SCA, the aircraft is a Boeing 747 jet, originally manufactured for commercial use, which was modified by NASA to transport the shuttles between destinations on Earth. The SCA designated NASA 905 is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Tim Jacobs KSC-2012-2296

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, STS-133 Mission Specialists Nicole Stott and Michael Barratt pose for a photographer in front of a Shuttle Carri More

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, STS-133 Mission Specialist Michael Barratt talks to a representative of the media with NASA T-38 jets in the background. Barratt was a member of the crew to fly on Discovery’s final mission in February and March 2011. Other members of the STS-133 crew were Commander Steve Lindsey, Pilot Eric Boe and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Discovery is scheduled to depart from Kennedy for the final time tomorrow morning on the back of a Shuttle Carrier Aircraft. Also known as an SCA, the aircraft is a Boeing 747 jet, originally manufactured for commercial use, which was modified by NASA to transport the shuttles between destinations on Earth. The SCA designated NASA 905 is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Tim Jacobs KSC-2012-2298

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, STS-133 Mission Specialist Michael Barratt talks to a representative of the media with NASA T-38 jets in the bac More

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Mission Specialist Alvin Drew visits with the media. Also present, but not in view, are Mission Specialists Nicole Stott, Michael Barrett and Steve Bowen, Pilot Eric Boe and Commander Steve Lindsay. In the background is the Shuttle Carrier Aircraft, or SCA, with space shuttle Discovery attached atop after being backed away from the mate/demate device. Known as the MDD, the devise is a large gantry-like steel structure used to hoist a shuttle off the ground and position it onto the back of the SCA. The SCA is a Boeing 747 jet that was originally manufactured for commercial use and modified by NASA to transport the shuttles between destinations on Earth. This SCA, designated NASA 905, is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Va. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Dimitri Gerondidakis KSC-2012-2285

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Mission Specialist Alvin Drew visits wit More

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. From the left, are Mission Specialists Nicole Stott, Michael Barrett and Alvin Drew facing away, Pilot Eric Boe and Commander Steve Lindsay. In the background is the Shuttle Carrier Aircraft, or SCA, with space shuttle Discovery attached atop after being backed away from the mate/demate device. Known as the MDD, the devise is a large gantry-like steel structure used to hoist a shuttle off the ground and position it onto the back of the SCA. The SCA is a Boeing 747 jet that was originally manufactured for commercial use and modified by NASA to transport the shuttles between destinations on Earth. This SCA, designated NASA 905, is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Va. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Dimitri Gerondidakis KSC-2012-2280

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. From the left, are Mission Specialists N More

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Commander Steve Lindsay visits with the media. Also present, but not in view, are Mission Specialists Nicole Stott, Michael Barrett, Steve Bowen and Alvin Drew, and Pilot Eric Boe. The crew arrived to view the Shuttle Carrier Aircraft, or SCA, with space shuttle Discovery attached atop after being backed away from the mate/demate device. Known as the MDD, the devise is a large gantry-like steel structure used to hoist a shuttle off the ground and position it onto the back of the SCA. The SCA is a Boeing 747 jet that was originally manufactured for commercial use and modified by NASA to transport the shuttles between destinations on Earth. This SCA, designated NASA 905, is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Va. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Dimitri Gerondidakis KSC-2012-2289

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Commander Steve Lindsay visits with the More

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Mission Specialists Michael Barrett foreground and Alvin Drew visit with the media. Also present, but not in view, are Mission Specialists Nicole Stott and Steve Bowen, Pilot Eric Boe and Commander Steve Lindsay. The crew arrived to view the Shuttle Carrier Aircraft, or SCA, with space shuttle Discovery attached atop after being backed away from the mate/demate device. Known as the MDD, the devise is a large gantry-like steel structure used to hoist a shuttle off the ground and position it onto the back of the SCA. The SCA is a Boeing 747 jet that was originally manufactured for commercial use and modified by NASA to transport the shuttles between destinations on Earth. This SCA, designated NASA 905, is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Va. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Dimitri Gerondidakis KSC-2012-2284

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Mission Specialists Michael Barrett fore More

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Pilot Eric Boe visits with the media. Also present, but not in view, are Mission Specialists Nicole Stott, Michael Barrett, Steve Bowen and Alvin Drew, and Commander Steve Lindsay. The crew arrived to view the Shuttle Carrier Aircraft, or SCA, with space shuttle Discovery attached atop after being backed away from the mate/demate device. Known as the MDD, the devise is a large gantry-like steel structure used to hoist a shuttle off the ground and position it onto the back of the SCA. The SCA is a Boeing 747 jet that was originally manufactured for commercial use and modified by NASA to transport the shuttles between destinations on Earth. This SCA, designated NASA 905, is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Va. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Dimitri Gerondidakis KSC-2012-2287

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Pilot Eric Boe visits with the media. Al More

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Commander Steve Lindsay visits with the media. Also present, but not in view, are Mission Specialists Nicole Stott, Michael Barrett, Steve Bowen and Alvin Drew, and Pilot Eric Boe. The crew arrived to view the Shuttle Carrier Aircraft, or SCA, with space shuttle Discovery attached atop after being backed away from the mate/demate device. Known as the MDD, the devise is a large gantry-like steel structure used to hoist a shuttle off the ground and position it onto the back of the SCA. The SCA is a Boeing 747 jet that was originally manufactured for commercial use and modified by NASA to transport the shuttles between destinations on Earth. This SCA, designated NASA 905, is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Va. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Dimitri Gerondidakis KSC-2012-2288

CAPE CANAVERAL, Fla. – At NASA Kennedy Space Center’s Shuttle Landing Facility in Florida, crew members of space shuttle Discovery’s last mission, STS-133, have arrived. Commander Steve Lindsay visits with the More

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, media representatives interview members of the last astronaut crew to fly aboard space shuttle Discovery, in the background, which is scheduled to depart from Kennedy for the final time tomorrow morning aboard a Shuttle Carrier Aircraft. Members of the crew of Discovery’s last mission, STS-133, were Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Also known as an SCA, the aircraft is a Boeing 747 jet, originally manufactured for commercial use, which was modified by NASA to transport the shuttles between destinations on Earth. The SCA designated NASA 905 is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Tim Jacobs KSC-2012-2295

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, media representatives interview members of the last astronaut crew to fly aboard space shuttle Discovery, in the More

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, media representatives interview members of the last astronaut crew to fly aboard space shuttle Discovery, in the background, which is scheduled to depart from Kennedy for the final time tomorrow morning aboard a Shuttle Carrier Aircraft. Members of the crew of Discovery’s last mission, STS-133, were Commander Steve Lindsey, Pilot Eric Boe, and Mission Specialists Nicole Stott, Michael Barratt, Alvin Drew and Steve Bowen. Also known as an SCA, the aircraft is a Boeing 747 jet, originally manufactured for commercial use, which was modified by NASA to transport the shuttles between destinations on Earth. The SCA designated NASA 905 is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. NASA 905 is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center. For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Tim Jacobs KSC-2012-2299

CAPE CANAVERAL, Fla. – At the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida, media representatives interview members of the last astronaut crew to fly aboard space shuttle Discovery, in the More