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KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak shows she is happy and excited to be preparing for launch with the fitting of her launch and entry suit. Nowak is making her first space flight. The launch is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1327

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak shows she is happy and excited to be preparing for launch with the fitting of her launch and entry suit. Nowak is making her first space flig More

KENNEDY SPACE CENTER, FLA. - Inside the payload changeout room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak takes a close look at part of the payload for the mission. She is dressed in a clean room suit, appropriate for the environmentally clean or "white room" condition in which the payload resides before being transferred to the shuttle's payload bay. The payload includes the multi-purpose logistics module Leonardo, which is carrying supplies and equipment for the International Space Station, the lightweight multi-purpose experiment support structure carrier and the integrated cargo carrier. Crew members are at NASA's Kennedy Space Center for Terminal Countdown Demonstration Test activities, which include equipment familiarization and a simulated launch countdown. Mission STS-121 is scheduled for launch on Space Shuttle Discovery on July 1. Photo credit: NASA/Kim Shiflett KSC-06pd1123

KENNEDY SPACE CENTER, FLA. - Inside the payload changeout room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak takes a close look at part of the payload for the mission. She is dressed in a clean r More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her launch suit during suitup for launch today on Space Shuttle Discovery. The launch is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1326A

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her launch suit during suitup for launch today on Space Shuttle Discovery. The launch is the 115th shuttle flight and the 18th More

KENNEDY SPACE CENTER, FLA. - STS-118 Commander Scott Kelly (left) and Mission Specialist Lisa Nowak look over equipment in the Space Station Processing Facility Facility during Crew Equipment Interface Test activities. The mission to the International Space Station will be delivering the third starboard truss segment, the ITS S5, which will be attached to the station, and a SPACEHAB Single Cargo Module with supplies and equipment. Launch aboard Space Shuttle Columbia is scheduled for Nov. 13, 2003. KSC-03pd0041

KENNEDY SPACE CENTER, FLA. - STS-118 Commander Scott Kelly (left) and Mission Specialist Lisa Nowak look over equipment in the Space Station Processing Facility Facility during Crew Equipment Interface Test a More

KENNEDY SPACE CENTER, FLA. - In the Space Station Processing Facility, the STS-118 crew take part in training on equipment for their mission. Mission Specialist Barbara Morgan (above) looks at equipment. Below are STS-119 Mission Specialist Carlos Noriega (left) and STS-118 Mission Specialist Lisa Nowak. The STS-118 mission will be delivering the third starboard truss segment, the ITS S5, to the International Space Station, and a SPACEHAB Single Cargo Module with supplies and equipment. Launch date is under review. KSC-03pd1198

KENNEDY SPACE CENTER, FLA. - In the Space Station Processing Facility, the STS-118 crew take part in training on equipment for their mission. Mission Specialist Barbara Morgan (above) looks at equipment. Belo More

KENNEDY SPACE CENTER, FLA. - STS-118 Mission Specialist Lisa Nowak looks at equipment in the Space Station Processing Facility. She and other crew members are at KSC to become familiar with equipment for their mission. The mission will be delivering the third starboard truss segment, the ITS S5, to the International Space Station, and a SPACEHAB Single Cargo Module with supplies and equipment. Launch date is under review. KSC-03pd1191

KENNEDY SPACE CENTER, FLA. - STS-118 Mission Specialist Lisa Nowak looks at equipment in the Space Station Processing Facility. She and other crew members are at KSC to become familiar with equipment for thei More

KENNEDY SPACE CENTER, FLA. - Inside the Orbiter Processing Facility bay 3 at NASA's Kennedy Space Center, STS-121 Mission Specialist Lisa Nowak gets a close look at the wing leading edge of Discovery, the launch vehicle for the mission. She and other crew members -- Commander Steven Lindsey, Pilot Mark Kelly and Mission Specialists Stephanie Wilson, Michael Fossum and Piers Sellers -- are at Kennedy for a crew equipment interface test, which provides hands-on experience with equipment they will use on orbit. Launch of STS-121, the second return-to-flight mission, is scheduled for no earlier than May. Photo credit: NASA/Kim Shiflett KSC-06pd0287

KENNEDY SPACE CENTER, FLA. - Inside the Orbiter Processing Facility bay 3 at NASA's Kennedy Space Center, STS-121 Mission Specialist Lisa Nowak gets a close look at the wing leading edge of Discovery, the launc More

KENNEDY SPACE CENTER, FLA. - Inside the Orbiter Processing Facility bay 3 at NASA's Kennedy Space Center, the STS-121 crew kneels for a photo with the vehicle crew. The crew members, recognized by the blue flight suits, are (left to right) Mission Specialists Piers Sellers and Michael Fossum, Commander Steven Lindsey, Mission Specialist Lisa Nowak, Pilot Mark Kelly and Mission Specialist Stephanie Wilson. The crew is at Kennedy for the crew equipment interface test, which provides hands-on experience with equipment they will use on orbit. KSC-06pd0292

KENNEDY SPACE CENTER, FLA. - Inside the Orbiter Processing Facility bay 3 at NASA's Kennedy Space Center, the STS-121 crew kneels for a photo with the vehicle crew. The crew members, recognized by the blue fl More

KENNEDY SPACE CENTER, FLA. - Inside the Orbiter Processing Facility bay 3 at NASA's Kennedy Space Center, STS-121 Mission Specialist Lisa Nowak and Commander Steven Lindsey take a close look at the wing leading edge of Discovery, the launch vehicle for the mission. They and other crew members -- Pilot Mark Kelly and Mission Specialists Stephanie Wilson, Michael Fossum and Piers Sellers -- are at Kennedy for a crew equipment interface test, which provides hands-on experience with equipment they will use on orbit. Launch of STS-121, the second return-to-flight mission, is scheduled for no earlier than May. Photo credit: NASA/Kim Shiflett KSC-06pd0288

KENNEDY SPACE CENTER, FLA. - Inside the Orbiter Processing Facility bay 3 at NASA's Kennedy Space Center, STS-121 Mission Specialist Lisa Nowak and Commander Steven Lindsey take a close look at the wing leading More

KENNEDY SPACE CENTER, FLA. - In NASA Kennedy Space Center's Orbiter Processing Facility bay 3, STS-121 Mission Specialist Lisa Nowak prepares for her upcoming mission inside Space Shuttle Discovery. The crew is at Kennedy to take part in the crew equipment interface test, which provides hands-on experience with equipment to be used on-orbit. Launch of Space Shuttle Discovery on mission STS-121, the second return-to-flight mission, is scheduled no earlier than May. KSC-06pd0322

KENNEDY SPACE CENTER, FLA. - In NASA Kennedy Space Center's Orbiter Processing Facility bay 3, STS-121 Mission Specialist Lisa Nowak prepares for her upcoming mission inside Space Shuttle Discovery. The crew is More

KENNEDY SPACE CENTER, FLA. - After landing at NASA's Kennedy Space Center aboard a Grumman G2 aircraft, the STS-121 crew gathers at a microphone for the media. Seen here at center is Mission Specialist Lisa Nowak; at left is Pilot Mark Kelly. Other crew members are Mission Commander Steven Lindsey, Pilot Mark Kelly, and Mission Specialists Michael Fossum, Stephanie Wilson, Piers Sellers and Thomas Reiter, who represents the European Space Agency. The crew is at the space center to take part in a Terminal Countdown Demonstration Test, or TCDT. Over several days, the crew will practice emergency egress from the pad and suit up in their orange flight suits for the simulated countdown to launch. Space Shuttle Discovery is designated to launch July 1 on mission STS-121. It will carry supplies to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1043

KENNEDY SPACE CENTER, FLA. - After landing at NASA's Kennedy Space Center aboard a Grumman G2 aircraft, the STS-121 crew gathers at a microphone for the media. Seen here at center is Mission Specialist Lisa No More

KENNEDY SPACE CENTER, FLA. - After landing at NASA's Kennedy Space Center aboard a Grumman G2 aircraft, the STS-121 crew gathers at a microphone for the media. Mission Commander Steven Lindsey is introducing the crew, from left: Mission Specialist Michael Fossum, Pilot Mark Kelly, Mission Specialist Lisa Nowak, Lindsey, Mission Specialists Stephanie Wilson, Piers Sellers and Thomas Reiter, who represents the European Space Agency. The crew is at the space center to take part in a Terminal Countdown Demonstration Test, or TCDT. Over several days, the crew will practice emergency egress from the pad and suit up in their orange flight suits for the simulated countdown to launch. Space Shuttle Discovery is designated to launch July 1 on mission STS-121. It will carry supplies to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1039

KENNEDY SPACE CENTER, FLA. - After landing at NASA's Kennedy Space Center aboard a Grumman G2 aircraft, the STS-121 crew gathers at a microphone for the media. Mission Commander Steven Lindsey is introducing t More

KENNEDY SPACE CENTER, FLA. - After their arrival at NASA's Kennedy Space Center, the STS-121 crew poses for a photo. From left are Mission Specialist Michael Fossum, Pilot Mark Kelly, Mission Specialist Lisa Nowak, Commander Steven Lindsey and Mission Specialists Stephanie Wilson, Piers Sellers and Thomas Reiter from Germany, who represents the European Space Agency. The crew is at the space center to take part in a Terminal Countdown Demonstration Test, or TCDT. Over several days, the crew will practice emergency egress from the pad and suit up in their orange flight suits for the simulated countdown to launch. Space Shuttle Discovery is designated to launch July 1 on mission STS-121. It will carry supplies to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1048

KENNEDY SPACE CENTER, FLA. - After their arrival at NASA's Kennedy Space Center, the STS-121 crew poses for a photo. From left are Mission Specialist Michael Fossum, Pilot Mark Kelly, Mission Specialist Lisa N More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak prepares to leap from the slidewire basket during training on emergency egress procedures from the launch pad. At left is Mission Specialist Michael Fossum. The crew is at Kennedy for Terminal Countdown Demonstration Test activities, including emergency egress training from the pad. They will also suit up in their orange flight suits for a simulated countdown to launch. Discovery is designated to launch July 1 on mission STS-121. It will carry supplies to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1069

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak prepares to leap from the slidewire basket during training on emergency egress procedures from the launch pad. At left is Mission Specialist More

KENNEDY SPACE CENTER, FLA. - Some of the STS-121 crew practices getting into a slidewire basket on Launch Pad 39B. At left is Mission Specialist Lisa Nowak; in front of her is Mission Specialist Michael Fossum. In the background are Commander Steven Lindsey and Mission Specialists Stephanie Wilson, Thomas Reiter and Piers Sellers. The crew is at Kennedy for Terminal Countdown Demonstration Test activities, including emergency egress training from the pad. They will also suit up in their orange flight suits for a simulated countdown to launch. Discovery is designated to launch July 1 on mission STS-121. It will carry supplies to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1062

KENNEDY SPACE CENTER, FLA. - Some of the STS-121 crew practices getting into a slidewire basket on Launch Pad 39B. At left is Mission Specialist Lisa Nowak; in front of her is Mission Specialist Michael Fossu More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her boot after donning her launch and entry suit in preparation for the simulated countdown she and other crew members will undertake. The crew is taking part in Terminal Countdown Demonstration Test activities, including the dress rehearsal for launch. Mission STS-121 is scheduled to be launched July 1. Photo credit: NASA/Kim Shiflett KSC-06pd1080

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her boot after donning her launch and entry suit in preparation for the simulated countdown she and other crew members will unde More

KENNEDY SPACE CENTER, FLA. - In the White Room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak has her launch suit checked by a member of the closeout crew before she enters Space Shuttle Discovery. The crew is taking part in a full dress rehearsal for launch, including countdown and culminating in main engine cutoff. The rehearsal is the final part of Terminal Countdown Demonstration Test (TCDT) activities that the crew has been involved in for two days. TCDT provides the crew of each mission an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency egress training. Mission STS-121 is scheduled to be launched July 1. Photo credit: NASA/Amanda Diller KSC-06pd1091

KENNEDY SPACE CENTER, FLA. - In the White Room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak has her launch suit checked by a member of the closeout crew before she enters Space Shuttle Discovery. More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak takes part in emergency egress practice on Launch Pad 39B. She is taking part in Terminal Countdown Demonstration Test (TCDT) activities that include a simulated countdown culminating in main engine cutoff. Mission STS-121 is scheduled to be launched July 1. Photo credit: NASA/Kim Shiflett KSC-06pd1099

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak takes part in emergency egress practice on Launch Pad 39B. She is taking part in Terminal Countdown Demonstration Test (TCDT) activities that More

KENNEDY SPACE CENTER, FLA. - Following training in the M-113 armored personnel carrier, the STS-121 crew pose for a photo with Capt. George Hoggard, who is astronaut rescue team leader. From left are Pilot Mark Kelly, Mission Specialist Lisa Nowak, Hoggard, Commander Steven Lindsey, and Mission Specialists Michael Fossum, Stephanie Wilson, Thomas Reiter and Piers Sellers. Reiter is from Germany and represents the European Space Agency. The STS-121 crew is taking turns driving the M-113 as part of Terminal Countdown Demonstration Test activities, which include emergency egress training from the pad and a simulated countdown. Mission STS-121 is designated for launch on July 1. Photo credit: NASA/Kim Shiflett KSC-06pd1111

KENNEDY SPACE CENTER, FLA. - Following training in the M-113 armored personnel carrier, the STS-121 crew pose for a photo with Capt. George Hoggard, who is astronaut rescue team leader. From left are Pilot M More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak takes her turn in an M-113, which is an armored personnel carrier. Behind her, at right, is Mission Specialist Thomas Reiter from Germany, and represents the European Space Agency. The STS-121 crew is taking turns driving the M-113 as part of Terminal Countdown Demonstration Test activities, which include emergency egress training from the pad and a simulated countdown. Mission STS-121 is designated for launch on July 1. Photo credit: NASA/Kim Shiflett KSC-06pd1106

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak takes her turn in an M-113, which is an armored personnel carrier. Behind her, at right, is Mission Specialist Thomas Reiter from Germany, a More

KENNEDY SPACE CENTER, FLA. - Inside the payload changeout room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak examines part of the payload for the mission. She is dressed in a clean room suit, appropriate for the environmentally clean or "white room" condition in which the payload resides before being transferred to the shuttle's payload bay. The payload includes the multi-purpose logistics module Leonardo, with supplies and equipment for the International Space Station; the lightweight multi-purpose experiment support structure carrier; and the integrated cargo carrier. Crew members are at NASA's Kennedy Space Center for Terminal Countdown Demonstration Test activities, which include equipment familiarization and a simulated launch countdown. Mission STS-121 is scheduled for launch on Space Shuttle Discovery on July 1. Photo credit: NASA/Kim Shiflett KSC-06pd1112

KENNEDY SPACE CENTER, FLA. - Inside the payload changeout room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak examines part of the payload for the mission. She is dressed in a clean room suit, appr More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is greeted by Center Director Jim Kennedy as she arrives at the Shuttle Landing Facility at KSC to get ready for launch on July 1. The launch will be the first space flight for Nowak. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. This mission is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1236

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is greeted by Center Director Jim Kennedy as she arrives at the Shuttle Landing Facility at KSC to get ready for launch on July 1. The laun More

KENNEDY SPACE CENTER, FLA. - Excited about her first space flight, STS-121 Mission Specialist Lisa Nowak completes a fitting on her launch suit in the Operations and Checkout Building. The crew is making final preparations for the launch on July 1 to the International Space Station. On the 12-day mission, the crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the station. This mission is the 115th shuttle flight and the 18th U.S. flight to the station. Photo credit: NASA/Kim Shiflett KSC-06pd1250

KENNEDY SPACE CENTER, FLA. - Excited about her first space flight, STS-121 Mission Specialist Lisa Nowak completes a fitting on her launch suit in the Operations and Checkout Building. The crew is making fina More

KENNEDY SPACE CENTER, FLA. - The STS-121 crew are donning their orange launch and entry suits for launch today on Space Shuttle Discovery. Having her boot worked on is Mission Specialist Lisa Nowak, who is making her first space flight. The launch is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1326

KENNEDY SPACE CENTER, FLA. - The STS-121 crew are donning their orange launch and entry suits for launch today on Space Shuttle Discovery. Having her boot worked on is Mission Specialist Lisa Nowak, who is More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak gets help with her launch suit for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed due to weather concerns and postponed 24 hours. The launch is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1370

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak gets help with her launch suit for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed due to we More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is still eager for launch during suitup for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed due to weather concerns and postponed 24 hours. The launch is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1372

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is still eager for launch during suitup for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is still eager for launch after suitup for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed due to weather concerns and postponed 24 hours. The launch is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1377

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is still eager for launch after suitup for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her boot during suitup for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed due to weather concerns and postponed 24 hours. The launch of Space Shuttle Discovery on mission STS-121 is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1372A

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her boot during suitup for a second launch attempt on Space Shuttle Discovery. The first launch attempt July 1 was scrubbed More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is happy to be making a third launch attempt on the mission. She is suiting up before heading to Launch Pad 39B. The July 2 launch attempt was scrubbed due to the presence of showers and thunderstorms within the surrounding area of the launch site. The launch of Space Shuttle Discovery on mission STS-121 is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1398

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is happy to be making a third launch attempt on the mission. She is suiting up before heading to Launch Pad 39B. The July 2 launch attempt More

KENNEDY SPACE CENTER, FLA. - In In the White Room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak is helped by the Closeout Crew with final preparations on her launch suit before entering Discovery. Situated on the end of the orbiter access arm, the White Room provides access into the orbiter on the pad. The crew is preparing for the third launch attempt in four days; previous attempts were scrubbed due to weather concerns. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. The launch of Space Shuttle Discovery on mission STS-121 is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. KSC-06pp1480

KENNEDY SPACE CENTER, FLA. - In In the White Room on Launch Pad 39B, STS-121 Mission Specialist Lisa Nowak is helped by the Closeout Crew with final preparations on her launch suit before entering Discovery. More

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her boots during suitup before heading to Launch Pad 39B and a third launch attempt. The July 2 launch attempt was scrubbed due to the presence of showers and thunderstorms within the surrounding area of the launch site. The launch of Space Shuttle Discovery on mission STS-121 is the 115th shuttle flight and the 18th U.S. flight to the International Space Station. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-06pd1399

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Lisa Nowak is helped with her boots during suitup before heading to Launch Pad 39B and a third launch attempt. The July 2 launch attempt was scrubbed More

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, NASA Administrator Mike Griffin (right) shares a story with STS-121 Pilot Mark Kelly, Mission Specialist Lisa Nowak and Commander Steven Lindsey. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett KSC-06pd1583

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, NASA Administrator Mike Griffin (right) shares a story with STS-121 Pilot Mark Kelly, Mission Specia More

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, NASA Administrator Mike Griffin (right) congratulates STS-121 Mission Specialist Michael Fossum on the successful mission. Fossum participated in three spacewalks, along with Mission Specialist Piers Sellers, to repair and replace equipment. Next to Fossum are Pilot Mark Kelly, Mission Specialist Lisa Nowak and (behind Griffin) Commander Steven Lindsey. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett KSC-06pd1584

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, NASA Administrator Mike Griffin (right) congratulates STS-121 Mission Specialist Michael Fossum on t More

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, Mission Specialist Lisa Nowak gets a close look at the nose cone. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett KSC-06pd1582

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, Mission Specialist Lisa Nowak gets a close look at the nose cone. Discovery's smooth and perfect la More