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KENNEDY SPACE CENTER, FLA. -- Seated in the cockpit of the shuttle training aircraft, or STA, STS-120 Commander Pamela Melroy is eager to begin landing practice on NASA's Shuttle Landing Facility runway. A modified Grumman American Aviation-built Gulf Stream II jet, the STA simulates an orbiter's cockpit, motion and visual cues and handling qualities. In flight, the STA duplicates the orbiter's atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. Melroy and other crew members are at Kennedy Space Center to take part in the terminal countdown demonstration test, which also includes a simulated launch countdown. Mission STS-120 is targeted for Oct. 23. Photo credit: NASA/Kim Shiflett KSC-07pd2691

KENNEDY SPACE CENTER, FLA. -- Seated in the cockpit of the shuttle training aircraft, or STA, STS-120 Commander Pamela Melroy is eager to begin landing practice on NASA's Shuttle Landing Facility runway. A mod More

CAPE CANAVERAL, Fla. - On the 195-foot level of the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members talk about using the slidewire baskets for emergency escape from the shuttle and pad. In the foreground are Mission Specialists John Grunsfeld, Mike Massimino and Andrew Feustel. Standing above them are (left to right) Mission Specialists Michael Good and Megan McArthur and Commander Scott Altman. The crew is at Kennedy to take part in terminal countdown demonstration test, or TCDT, activities before launching on space shuttle Atlantis’ mission to service NASA’s Hubble Space Telescope. TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and a simulated launch countdown. Atlantis is targeted to launch Oct. 10. Photo credit: NASA/Kim Shiflett KSC-08pd2863

CAPE CANAVERAL, Fla. - On the 195-foot level of the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members talk about using the slidewire baskets for emergenc More

KENNEDY SPACE CENTER, FLA. -- STS-123 Mission Specialist Garrett Reisman works at putting on his gloves while suiting up for the launch dress rehearsal, culmination of the terminal countdown demonstration test, or TCDT. The TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Space shuttle Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on the 16-day STS-123 mission to the International Space Station. Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0539

KENNEDY SPACE CENTER, FLA. -- STS-123 Mission Specialist Garrett Reisman works at putting on his gloves while suiting up for the launch dress rehearsal, culmination of the terminal countdown demonstration tes More

KENNEDY SPACE CENTER, FLA. -- At the slidewire basket landing on Launch Pad 39A, the space shuttle Atlantis STS-122 crew responds to questions from the media. From left are Commander Steve Frick (with the microphone); Pilot Alan Poindexter; and Mission Specialists Leland Melvin, Rex Walheim, Hans Schlegel, Stanley Love and Leopold Eyharts. Schlegel and Eyharts are with the European Space Agency. Eyharts will remain on the International Space Station as a flight engineer for Expedition 16 following the STS-122 mission. The STS-122 crew is at NASA's Kennedy Space Center to take part in terminal countdown demonstration test, or TCDT, activities, a standard part of launch preparations. The TCDT provides astronauts and ground crews with equipment familiarization, emergency egress training and a simulated launch countdown. On mission STS-122, Atlantis will deliver the European Space Agency's Columbus module to the International Space Station. Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony, and will expand the research facilities aboard the station. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3372

KENNEDY SPACE CENTER, FLA. -- At the slidewire basket landing on Launch Pad 39A, the space shuttle Atlantis STS-122 crew responds to questions from the media. From left are Commander Steve Frick (with the mic More

KENNEDY SPACE CENTER, FLA. -- During emergency egress from Launch Pad 39A, STS-120 Mission Specialists Stephanie Wilson (foreground) and Doug Wheelock settle in the slidewire basket. Wilson reaches for the release lever. The basket can carry them to a safe landing site below, if needed. The activity is part of the prelaunch terminal countdown demonstration test, or TCDT. The TCDT at NASA's Kennedy Space Center provides astronauts and ground crews an opportunity to participate in various launch preparation activities, including equipment familiarization and emergency training. The STS-120 mission will deliver the U.S. Node 2 module, named Harmony, aboard space shuttle Discovery to the International Space Station. Discovery is targeted to launch on its 14-day mission at 11:38 a.m. EDT on Oct. 23. Photo credit: NASA/Kim Shiflett KSC-07pd2801

KENNEDY SPACE CENTER, FLA. -- During emergency egress from Launch Pad 39A, STS-120 Mission Specialists Stephanie Wilson (foreground) and Doug Wheelock settle in the slidewire basket. Wilson reaches for the rel More

KENNEDY SPACE CENTER, FLA. -- The STS-120 crew is at NASA's Kennedy Space Center for the pre-launch terminal countdown demonstration test, or TCDT. Here, during emergency egress training, crew members practice climbing into the slidewire baskets that can carry them safely to a landing site away from the shuttle. In the basket are, from left, Mission Specialists Doug Wheelock and Scott Parazynski and Pilot George Zamka. Watching them are, from left, Commander Pamela Melroy and Mission Specialists Stephanie Wilson and Daniel Tani, with camera. After the mission, Tani will remain aboard the International Space Station and return with the STS-122 crew, targeted to launch Dec. 6. The TCDT provides astronauts and ground crews an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. The STS-120 mission will deliver the U.S. Node 2 module, named Harmony, aboard space shuttle Discovery to the International Space Station. Launch of Discovery on mission STS-120 is targeted for Oct. 23 at 11:38 a.m. EDT on a 14-day mission. Photo credit: NASA/Kim Shiflett KSC-07pd2738

KENNEDY SPACE CENTER, FLA. -- The STS-120 crew is at NASA's Kennedy Space Center for the pre-launch terminal countdown demonstration test, or TCDT. Here, during emergency egress training, crew members practice More

CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center, STS-124 Mission Specialist Akihiko Hoshide sits in his seat aboard space shuttle Discovery following the simulated launch countdown, part of the launch dress rehearsal known as the terminal countdown demonstration test. TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including a simulated launch countdown, equipment familiarization and emergency egress training. On the STS-124 mission, the crew will deliver and install the Japanese Experiment Module – Pressurized Module and Japanese Remote Manipulator System. Discovery's launch is targeted for May 31. Photo credit: NASA/Kim Shiflett KSC-08pd1256

CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center, STS-124 Mission Specialist Akihiko Hoshide sits in his seat aboard space shuttle Discovery following the simulated launch countdown, par More

CAPE CANAVERAL, Fla. -- Back at the NASA Kennedy Space Center Shuttle Landing Facility, STS-124 Commander Mark Kelly happily crosses the parking area after the successful space shuttle landing practice aboard NASA's Shuttle Training Aircraft, or STA. The STA is a Grumman American Aviation-built Gulf Stream II jet that was modified to simulate an orbiter's cockpit, motion and visual cues, and handling qualities. In flight, the STA duplicates the orbiter's atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. Because the orbiter is unpowered during re-entry and landing, its high-speed glide must be perfectly executed the first time. The crew for space shuttle Discovery's STS-124 mission is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test, or TCDT. Providing astronauts and ground crews with an opportunity to participate in various simulated countdown activities, TCDT includes equipment familiarization and emergency training. Discovery's launch is targeted for May 31. Photo credit: NASA/Kim Shiflett KSC-08pd1162

CAPE CANAVERAL, Fla. -- Back at the NASA Kennedy Space Center Shuttle Landing Facility, STS-124 Commander Mark Kelly happily crosses the parking area after the successful space shuttle landing practice aboard More

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Leland Melvin talks to the media at Kennedy Space Center's Shuttle Landing Facility following his arrival to participate in three days of terminal countdown demonstration test, or TCDT, activities. The TCDT provides astronauts and ground crews with equipment familiarization, emergency egress training and a simulated launch countdown. On mission STS-122, Atlantis will deliver the Columbus module to the International Space Station. The European Space Agency's largest single contribution to the station, Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony. The laboratory will expand the research facilities aboard the station, providing crew members and scientists from around the world the ability to conduct a variety of experiments in the physical, materials and life sciences. Photo credit: NASA/George Shelton KSC-07pd3328

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Leland Melvin talks to the media at Kennedy Space Center's Shuttle Landing Facility following his arrival to participate in three More

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Commander Steve Frick puts on his helmet, part of his launch and entry suit, in astronaut crew quarters. The STS-122 crew is preparing for a simulated launch countdown aboard Atlantis, part of terminal countdown demonstration test, or TCDT, activities at NASA's Kennedy Space Center. The TCDT is a dress rehearsal for launch and also provides astronauts and ground crews with equipment familiarization and emergency egress training. On mission STS-122, Atlantis will deliver the Columbus module to the International Space Station. The European Space Agency's largest single contribution to the station, Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony. The laboratory will expand the research facilities aboard the station, providing crew members and scientists from around the world the ability to conduct a variety of experiments in the physical, materials and life sciences. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3411

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Commander Steve Frick puts on his helmet, part of his launch and entry suit, in astronaut crew quarters. The STS-122 crew is preparing for a simul More

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Leland Melvin tries on his launch and entry suit, preparing for launch. The fitting is part of terminal countdown demonstration test, or TCDT, activities the crew is undertaking at NASA's Kennedy Space Center. The TCDT provides astronauts and ground crews with equipment familiarization, emergency egress training and a simulated launch countdown. On mission STS-122, Atlantis will deliver the Columbus module to the International Space Station. The European Space Agency's largest single contribution to the station, Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony. The laboratory will expand the research facilities aboard the station, providing crew members and scientists from around the world the ability to conduct a variety of experiments in the physical, materials and life sciences. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3358

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Leland Melvin tries on his launch and entry suit, preparing for launch. The fitting is part of terminal countdown demonstration t More

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Complex 39, STS-123 Mission Specialist Robert L. Behnken takes time out from driving practice of the M-113 armored personnel carrier to pose for a photo. The crew members of space shuttle Endeavour's STS-123 mission will each practice driving the M-113 in turn as part of his training on emergency egress procedures. An M-113 will be available to transport the crew to safety in the event of a contingency on the pad before their launch. The STS-123 crew is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test or TCDT. Endeavour's seven astronauts arrived at Kennedy's Shuttle Landing Facility in their T-38 training aircraft between 10:45 and 10:58 a.m. EST. The terminal countdown demonstration test provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on a 16-day mission to the International Space Station. On the mission, Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0470

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Complex 39, STS-123 Mission Specialist Robert L. Behnken takes time out from driving practice of the M-113 armored personnel carrier to pose f More

CAPE CANAVERAL, Fla. - STS-125 Pilot Gregory C. Johnson is ready to practice driving the M-113 armored personnel carrier. The crew members of space shuttle Atlantis' STS-125 mission will each practice driving the M-113 in turn as part of their training on emergency egress procedures. An M-113 will be available to transport the crew to safety in the event of a contingency on the pad before their launch. The crew is at NASA's Kennedy Space Center for a dress launch rehearsal called the terminal countdown demonstration test, or TCDT. It provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and a simulated launch countdown. The STS-125 mission aboard space shuttle Atlantis to service NASA’s Hubble Space Telescope is targeted to launch Oct. 10. Photo credit: NASA/Kim Shiflett KSC-08pd2816

CAPE CANAVERAL, Fla. - STS-125 Pilot Gregory C. Johnson is ready to practice driving the M-113 armored personnel carrier. The crew members of space shuttle Atlantis' STS-125 mission will each practice driving More

KENNEDY SPACE CENTER, FLA. -- The shuttle training aircraft, or STA, moves toward the runway on NASA's Shuttle Landing Facility. In the cockpit are STS-120 Commander Pamela Melroy and Pilot George Zamka, who will begin landing practice on the runway. A modified Grumman American Aviation-built Gulf Stream II jet, the STA simulates an orbiter's cockpit, motion and visual cues and handling qualities. In flight, the STA duplicates the orbiter's atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. Melroy and other crew members are at Kennedy Space Center to take part in the terminal countdown demonstration test, which also includes a simulated launch countdown. Mission STS-120 is targeted for Oct. 23. Photo credit: NASA/Kim Shiflett KSC-07pd2693

KENNEDY SPACE CENTER, FLA. -- The shuttle training aircraft, or STA, moves toward the runway on NASA's Shuttle Landing Facility. In the cockpit are STS-120 Commander Pamela Melroy and Pilot George Zamka, who More

KENNEDY SPACE CENTER, FLA. -- In the white room on Launch Pad 39B, STS-116 Mission Specialist Sunita Williams is helped with her gear before entering Space Shuttle Discovery. The mission crew is taking part in a simulated launch countdown, part of the terminal countdown demonstration test that includes prelaunch preparations. The STS-116 mission is No. 20 to the International Space Station and construction flight 12A.1. The mission payload is the SPACEHAB module, the P5 integrated truss structure and other key components. Launch is scheduled for no earlier than Dec. 7. Photo credit: NASA/Amanda Diller KSC-06pd2602

KENNEDY SPACE CENTER, FLA. -- In the white room on Launch Pad 39B, STS-116 Mission Specialist Sunita Williams is helped with her gear before entering Space Shuttle Discovery. The mission crew is taking part More

CAPE CANAVERAL, Fla. –At the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida, STS-128 Pilot Kevin Ford walks away from the Shuttle Training Aircraft, or STA, after completing shuttle landing practice. The practice is in preparation for launch of space shuttle Discovery's STS-128 mission in late August to the International Space Station. The STA is a Grumman American Aviation-built Gulfstream II jet that was modified to simulate a shuttle’s cockpit, motion and visual cues, and handling qualities. The STS-128 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-2009-4483

CAPE CANAVERAL, Fla. –At the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida, STS-128 Pilot Kevin Ford walks away from the Shuttle Training Aircraft, or STA, after completing shuttle landing More

CAPE CANAVERAL, Fla. – STS-127 Mission Specialist Tim Kopra is happy to have successfully driven the M-113 armored personnel carrier, which is part of the training on emergency egress procedures. The crew members of space shuttle Endeavour's STS-127 mission are taking turns driving the M-113. An M-113 will be available to transport the crew to safety in the event of a contingency on the pad before their launch. The crew is at NASA's Kennedy Space Center for a launch dress rehearsal called the terminal countdown demonstration test, or TCDT, which includes the emergency egress training and equipment familiarization. The STS-127 mission is the final of three flights dedicated to the assembly of the Japanese Kibo laboratory complex. Endeavour's launch is targeted for June 13. Photo credit: NASA/Kim Shiflett KSC-2009-3379

CAPE CANAVERAL, Fla. – STS-127 Mission Specialist Tim Kopra is happy to have successfully driven the M-113 armored personnel carrier, which is part of the training on emergency egress procedures. The crew membe More

KENNEDY SPACE CENTER, Fla. -- On the slidewire basket bunker area of Launch Pad 39A, STS-118 educator astronaut and Mission Specialist Barbara R. Morgan responds to a question from the media before the crew's morning training activities in the terminal countdown demonstration test, or TCDT. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. TCDT activities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton KSC-07pd1935

KENNEDY SPACE CENTER, Fla. -- On the slidewire basket bunker area of Launch Pad 39A, STS-118 educator astronaut and Mission Specialist Barbara R. Morgan responds to a question from the media before the crew's More

KENNEDY SPACE CENTER, FLA. -- The space shuttle Atlantis STS-122 crew receives instruction on emergency exit from the fixed service structure on Launch Pad 39A. From left are Pilot Alan Poindexter and Mission Specialists Leopold Eyharts and Stanley Love. Eyharts is with the European Space Agency and will remain on the International Space Station as a flight engineer for Expedition 16 following the STS-122 mission. The STS-122 crew is at NASA's Kennedy Space Center to take part in terminal countdown demonstration test, or TCDT, activities, a standard part of launch preparations. The TCDT provides astronauts and ground crews with equipment familiarization and a simulated launch countdown before launch. On mission STS-122, Atlantis will deliver the European Space Agency's Columbus module to the International Space Station. Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony, and will expand the research facilities aboard the station. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3384

KENNEDY SPACE CENTER, FLA. -- The space shuttle Atlantis STS-122 crew receives instruction on emergency exit from the fixed service structure on Launch Pad 39A. From left are Pilot Alan Poindexter and Mission More

CAPE CANAVERAL, Fla. - On Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Megan McArthur is ready to talk to the media about her role in the mission. The crew is at Kennedy to take part in terminal countdown demonstration test, or TCDT, activities before launching on space shuttle Atlantis’ mission to service NASA’s Hubble Space Telescope. TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and a simulated launch countdown. Atlantis is targeted to launch Oct. 10. Photo credit: NASA/Kim Shiflett KSC-08pd2849

CAPE CANAVERAL, Fla. - On Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Megan McArthur is ready to talk to the media about her role in the mission. The crew is at Kenned More

KENNEDY SPACE CENTER, FLA. -- At the Shuttle Landing Facility, STS-116 Mission Specialist Nicholas Patrick is greeted after his arrival by Kennedy Space Center Deputy Director Bill Parsons. The crew has returned to KSC for the terminal countdown demonstration test, which are prelaunch preparations that include a simulated launch countdown. Crew members also include Commander Mark Polansky, Pilot William Oefelein, Mission Specialists Sunita Williams, Robert Curbeam, Christer Fuglesang and Joan Higginbotham. The mission is No. 20 to the International Space Station and construction flight 12A.1. The mission payload is the SPACEHAB module, the P5 integrated truss structure and other key components. Launch is scheduled for no earlier than Dec. 7. Photo credit: NASA/Kim Shiflett KSC-06pd2511

KENNEDY SPACE CENTER, FLA. -- At the Shuttle Landing Facility, STS-116 Mission Specialist Nicholas Patrick is greeted after his arrival by Kennedy Space Center Deputy Director Bill Parsons. The crew has returne More

CAPE CANAVERAL, Fla. - The STS-125 crew members listen to instructions for driving the M-113 armored personnel carrier. From left are Mission Specialists John Grunsfeld, Megan McArthur, Michael Good, Mike Massimino and Gregory C. Johnson. The crew members of space shuttle Atlantis' STS-125 mission will each practice driving the M-113 in turn as part of their training on emergency egress procedures. An M-113 will be available to transport the crew to safety in the event of a contingency on the pad before their launch. The crew is at NASA's Kennedy Space Center for a dress launch rehearsal called the terminal countdown demonstration test, or TCDT. It provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and a simulated launch countdown. The STS-125 mission aboard space shuttle Atlantis to service NASA’s Hubble Space Telescope is targeted to launch Oct. 10. Photo credit: NASA/Kim Shiflett KSC-08pd2807

CAPE CANAVERAL, Fla. - The STS-125 crew members listen to instructions for driving the M-113 armored personnel carrier. From left are Mission Specialists John Grunsfeld, Megan McArthur, Michael Good, Mike Mas More

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Pad 39A, the crew for space shuttle Endeavour's STS-123 mission receives instruction for emergency egress from the pad. In blue flight suits, from left, are Mission Specialist Mike Foreman; Pilot Gregory H. Johnson; Mission Specialists Takao Doi of the Japan Aerospace Exploration Agency, Garrett Reisman and Robert L. Behnken; and Commander Dominic Gorie. The crew is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test or TCDT. The terminal countdown demonstration test provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on a 16-day mission to the International Space Station. On the mission, Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0506

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Pad 39A, the crew for space shuttle Endeavour's STS-123 mission receives instruction for emergency egress from the pad. In blue flight suits, More

CAPE CANAVERAL, Fla. - STS-125 Mission Specialist Megan McArthur is ready to practice driving the M-113 armored personnel carrier. The crew members of space shuttle Atlantis' STS-125 mission will each practice driving the M-113 in turn as part of their training on emergency egress procedures. An M-113 will be available to transport the crew to safety in the event of a contingency on the pad before their launch. The crew is at NASA's Kennedy Space Center for a dress launch rehearsal called the terminal countdown demonstration test, or TCDT. It provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and a simulated launch countdown. The STS-125 mission aboard space shuttle Atlantis to service NASA’s Hubble Space Telescope is targeted to launch Oct. 10. Photo credit: NASA/Kim Shiflett KSC-08pd2811

CAPE CANAVERAL, Fla. - STS-125 Mission Specialist Megan McArthur is ready to practice driving the M-113 armored personnel carrier. The crew members of space shuttle Atlantis' STS-125 mission will each practice More

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Leland Melvin tries on the gloves of his launch and entry suit, preparing for launch. The fitting is part of terminal countdown demonstration test, or TCDT, activities the crew is undertaking at NASA's Kennedy Space Center. The TCDT provides astronauts and ground crews with equipment familiarization, emergency egress training and a simulated launch countdown. On mission STS-122, Atlantis will deliver the Columbus module to the International Space Station. The European Space Agency's largest single contribution to the station, Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony. The laboratory will expand the research facilities aboard the station, providing crew members and scientists from around the world the ability to conduct a variety of experiments in the physical, materials and life sciences. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3359

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Leland Melvin tries on the gloves of his launch and entry suit, preparing for launch. The fitting is part of terminal countdown d More

CAPE CANAVERAL, Fla. - On Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist John Grunsfeld discusses his role in the mission for the media. The crew is at Kennedy to take part in terminal countdown demonstration test, or TCDT, activities before launching on space shuttle Atlantis’ mission to service NASA’s Hubble Space Telescope. TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and a simulated launch countdown. Atlantis is targeted to launch Oct. 10. Photo credit: NASA/Kim Shiflett KSC-08pd2852

CAPE CANAVERAL, Fla. - On Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist John Grunsfeld discusses his role in the mission for the media. The crew is at Kennedy to take pa More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-119 Mission Specialist Steve Swanson is ready to practice driving the M-113 armored personnel carrier used for emergency escape, if needed, from the launch pad. The crew members are at Kennedy for prelaunch preparation known as terminal countdown demonstration test, or TCDT. The training provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and a simulated launch countdown. The crew of space shuttle Discovery is targeted to launch on the STS-119 mission Feb. 12. During Discovery's 14-day mission, the crew will install the S6 truss segment and solar arrays to the starboard side of the International Space Station, completing the station's truss, or backbone. Photo credit: NASA/Kim Shiflett KSC-2009-1207

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-119 Mission Specialist Steve Swanson is ready to practice driving the M-113 armored personnel carrier used for emergency escape, if needed, More

CAPE CANAVERAL, Fla. – STS-127 crew members gather at NASA Kennedy Space Center's Launch Pad 39A for a question-and-answer session with the media. At left is Commander Mark Polansky, introducing the other astronauts, who are, from left, Pilot Doug Hurley and Mission Specialists Julie Payette, Tom Marshburn, Tim Kopra, Chris Cassidy and Dave Wolf. Payette represents the Canadian Space Agency. In the background is the fixed service structure with the solid rocket boosters and external fuel tank attached to space shuttle Endeavour. The crew is at Kennedy for a launch dress rehearsal called the terminal countdown demonstration test, or TCDT, which includes emergency egress training and equipment familiarization. Space shuttle Endeavour's STS-127 mission is the final of three flights dedicated to the assembly of the Japanese Kibo laboratory complex on the International Space Station. Endeavour's launch is targeted for June 13. Photo credit: NASA/Kim Shiflett KSC-2009-3403

CAPE CANAVERAL, Fla. – STS-127 crew members gather at NASA Kennedy Space Center's Launch Pad 39A for a question-and-answer session with the media. At left is Commander Mark Polansky, introducing the other astr More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-119 Mission Specialist Koichi Wakata is ready to practice driving the M-113 armored personnel carrier used for emergency escape, if needed, from the launch pad. Wakata represents the Japan Aerospace Exploration Agency. The crew members are at Kennedy for prelaunch preparation known as terminal countdown demonstration test, or TCDT. The training provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and a simulated launch countdown. The crew of space shuttle Discovery is targeted to launch on the STS-119 mission Feb. 12. During Discovery's 14-day mission, the crew will install the S6 truss segment and solar arrays to the starboard side of the International Space Station, completing the station's truss, or backbone. Photo credit: NASA/Kim Shiflett KSC-2009-1204

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-119 Mission Specialist Koichi Wakata is ready to practice driving the M-113 armored personnel carrier used for emergency escape, if needed, More

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Complex 39, STS-123 crew members are instructed on the use of the M-113 armored personnel carrier from Capt. George Hoggard, astronaut rescue team leader. The crew members of space shuttle Endeavour's STS-123 mission will each practice driving the M-113 in turn as part of his training on emergency egress procedures. An M-113 will be available to transport the crew to safety in the event of a contingency on the pad before their launch. The STS-123 crew is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test or TCDT. Endeavour's seven astronauts arrived at Kennedy's Shuttle Landing Facility in their T-38 training aircraft between 10:45 and 10:58 a.m. EST. The terminal countdown demonstration test provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on a 16-day mission to the International Space Station. On the mission, Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0466

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Complex 39, STS-123 crew members are instructed on the use of the M-113 armored personnel carrier from Capt. George Hoggard, astronaut rescue More

KENNEDY SPACE CENTER, FLA. -- Following the simulated launch countdown, STS-123 crew members begin exiting space shuttle Endeavour into the White Room on Launch Pad 39 at NASA's Kennedy Space Center. To leave the pad, the STS-123 crew will practice emergency egress using the slidewire baskets. The countdown was the culmination of the terminal countdown demonstration test, or TCDT. The TCDT provides astronauts and ground crews with an opportunity to participate in various countdown activities, including equipment familiarization and emergency egress training. Endeavour is targeted to launch at 2:28 a.m. EDT March 11 on the 16-day STS-123 mission to the International Space Station. Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0583

KENNEDY SPACE CENTER, FLA. -- Following the simulated launch countdown, STS-123 crew members begin exiting space shuttle Endeavour into the White Room on Launch Pad 39 at NASA's Kennedy Space Center. To leave More

Apollo 8 astronaut William Anders, in the Apollo 8 mission countdown demonstration test

Apollo 8 astronaut William Anders, Lunar Module (LM) pilot, is suited up for the Apollo 8 mission countdown demonstration test. The first manned Apollo mission launched aboard the Saturn V and first manned Apol More

KSC-68PC-302, NASA Apollo program

CAPE CANAVERAL, Fla. – Apollo 9 astronauts, left to right, James McDivitt, David Scott and Russell Schweickart pause in front of the Apollo/Saturn V space vehicle that will launch Apollo 8 space pilots Frank Bo More

ASTP Saturn IB CDDT. NASA public domain image colelction.

Dawn breaks behind the ASTP Saturn IB launch vehicle during the Countdown Demonstration Test. The Mobile Service Structure was moved away from the vehicle for the test, which is a step-by-step dress rehearsal f More

Apollo 9, NASA Apollo program. NASA public domain image colelction.

Description: (February 1969) Astronaut Russell L. Schweickart, Apollo 9 prime crew lunar module pilot, participates in a Countdown Demonstration Test. He is wearing an Extravehicular Mobility Unit, or EMU. In a More

Firing Room #2 During Apollo 12 CDDT

Overall view of the Firing Room #2 in the Launch Control Center during the Countdown Demonstration Test for the Apollo 12 mission...Image # : 69PC-0570.October 29, 1969

APOLLO 9 - PRELAUNCH (CDDT) - KSC

S69-27089 (11 March 1969) --- Overall view of Pad B, Launch Complex 39, Kennedy Space Center, showing the Apollo 10 (Spacecraft 106/Lunar Module-4/Saturn 505) space vehicle during a Countdown Demonstration Test More

Apollo 9 crew prepares to participate in Countdown Demonstration Test

S69-25488 (23 Feb. 1969) --- Interior view of the White Room at Pad A, Launch Complex 39, Kennedy Space Center (KSC), during an Apollo 9 Countdown Demonstration Test (CDDT). Astronauts James A. McDivitt, comman More

View of White Room atop Pad A during Apollo 9 Countdown Demonstration Test

S69-25884 (23 Feb. 1969) --- Interior view of the white room atop Pad A, Launch Complex 39, Kennedy Space Center, during Apollo 9 Countdown Demonstration Test activity. Standing next to spacecraft hatch is astr More

Firing Room 2 in Launch Control Center at KSC during Apollo 9 countdown test

S69-25880 (23 Feb. 1969) --- Overall view of Firing Room 2 in the Launch Control Center, Launch Complex 39, Kennedy Space Center, during an Apollo 9 Countdown Demonstration Test. Astronauts James A. McDivitt, D More

Launch - Apollo 9 - KSC, NASA Apollo program

S69-25878 (23 Feb. 1969) --- Astronaut Russell L. Schweickart, lunar module pilot of the Apollo 9 prime crew, wears the Extravehicular Mobility Unit (EMU) which he will use during his scheduled Apollo 9 extrave More

APOLLO X - LAUNCH VEHICLE APOLLO-SATURN (AS)-505 - COUNTDOWN DEMONSTRATION TEST (CDDT) - KSC

S69-33853 (4 May 1969) --- Ground-level view of the Apollo 10 (Spacecraft 106/Lunar Module 4/Saturn 505) space vehicle on Pad B, Launch Complex 39, Kennedy Space Center, Florida. This photograph of the 363-feet More

Firing Room 3 of Launch Control Center, Launch Complex 39 countdown test

S69-34332 (13 May 1969) --- Overall view of Firing Room 3 of the Launch Control Center, Launch Complex 39, Kennedy Space Center, Florida, during an Apollo 10 Countdown Demonstration Test. The crew of the schedu More

APOLLO X ASTRONAUTS - COUNTDOWN DEMONSTRATION TEST (CDDT) - CAPE

S69-34333 (13 May 1969) --- The three Apollo 10 astronauts suit up for a Countdown Demonstration Test at the Kennedy Space Center during preparations for their scheduled lunar orbit mission. From front to rear, More

Astronaut Thomas Stafford - Countdown Demonstration Test (CDDT) - KSC

S69-34330 (13 May 1969) --- Astronaut Thomas P. Stafford, Apollo 9 commander, is suited up at the Kennedy Space Center for a Countdown Demonstration Test during preparations for the scheduled Apollo 10 lunar or More

PRELAUNCH - APOLLO 10 - KSC, NASA Apollo program

S69-34334 (13 May 1969) --- Astronaut Eugene A. Cernan, Apollo 10 lunar module pilot, is suited up at the Kennedy Space Center for a Countdown Demonstration Test during preparations for the scheduled Apollo 10 More

PRELAUNCH - APOLLO X - CAPE, NASA Apollo program

S69-34337 (6 May 1969) --- Apollo 10 astronauts John W. Young (left), command module pilot; and Thomas P. Stafford, commander, leave the Kennedy Space Center's (KSC) Manned Spacecraft Operations Building for Pa More

KENNEDY SPACE CENTER, FLA. - The 402-foot-tall mobile service structure is moved away from the Apollo 11 spacecraft at Launch Pad 39A. The move was made during a recent Countdown Demonstration Test, participated in by Apollo 11 astronauts Neil A. Armstrong, Michael Collins and Edwin E. Aldrin Jr. KSC-69PC-353

KENNEDY SPACE CENTER, FLA. - The 402-foot-tall mobile service structure is moved away from the Apollo 11 spacecraft at Launch Pad 39A. The move was made during a recent Countdown Demonstration Test, participa More

APOLLO XI - PRELAUNCH - COUNTDOWN DEMONSTRATION TEST (CDDT) - KSC

Apollo XI Launch Vehicle AS-506 and Spacecraft 107, Launch Pad 39A for CDDT (Countdown Demonstration Test), includes MSS (Mobile Service Structure) pullback, KSC. 1. APOLLO XI - PRELAUNCH KENNEDY SPACE CENTER, FL

KENNEDY SPACE CENTER, FLA. - Apollo 11 crew "suiting up" for Countdown Demonstration Test. KSC-69P-558

KENNEDY SPACE CENTER, FLA. - Apollo 11 crew "suiting up" for Countdown Demonstration Test.

KENNEDY SPACE CENTER, FLA. - Pad Leader Guenter Wendt, kneeling, supervises preparations to remove the Apollo 11 astronauts from their spacecraft following the Countdown Demonstration Test, a dress rehearsal prior to the actual launch day. Visible in the hatchway is Command Module Pilot Michael Collins. To his left is Apollo 11 Commander Neil A. Armstrong. At Collins' right is Lunar Module Pilot Edwin E. Aldrin Jr. KSC-69PC-337

KENNEDY SPACE CENTER, FLA. - Pad Leader Guenter Wendt, kneeling, supervises preparations to remove the Apollo 11 astronauts from their spacecraft following the Countdown Demonstration Test, a dress rehearsal p More

Apollo 11 - Saturn Apollo Program

Apollo 11 crew member Michael Collins appears calm after suiting up activities for his participation in the countdown demonstration test aboard the Apollo 11 space craft along with astronauts Aldrin and Armstro More

Apollo 11 spacecraft pre-launch

Personnel atop the 402-ft. Mobile Service Structure look back at the Apollo 11 spacecraft as the tower is moved away during a Countdown Demonstration Test. Photo filed 11 July 1969.

Apollo 11 - Saturn Apollo Program

Apollo 11 crew members (left to right) Michael Collins, Edwin Aldrin (foreground), and Neil Armstrong, wearing space suits, leave the Apollo 11 space craft after participation in the countdown demonstration tes More

Apollo 11 - Saturn Apollo Program

Apollo 11 crew members (rear to front) Neil Armstrong, Edwin Aldrin, and Michael Collins, wearing space suits, ride the van to the launch pad to participate in the countdown demonstration test for the upcoming More

Apollo 11 - Saturn Apollo Program

Seriousness exudes from launch official Miles Ross (left) of Kennedy Space Flight Center (KSC) and Major General E.F. O’Conner, director of program management of the Marshall Space Flight Center (MSFC), as they More

Apollo 11 - Saturn Apollo Program

Dr. Kurt Debus, director of the Kennedy Space Flight Center (KSC), participated in the countdown demonstration test for the Apollo 11 mission in firing room 1 of the KSC control center. The Apollo 11 mission, t More

Apollo 11 - Saturn Apollo Program

Lee B. James (left), manager of the Saturn Program at the Marshall Space flight Center (MSFC), talks with Isom Pigell in the firing room 1 of the Kennedy Space Center (KSC) control center during the countdown d More

Apollo 11 - Saturn Apollo Program

Lee B. James (left), manager of the Saturn Program at the Marshall Space flight Center (MSFC), talks with Isom Pigell in the firing room 1 of the Kennedy Space Center (KSC) control center during the countdown d More

Apollo 11 - Saturn Apollo Program

Apollo 11 crew members (left to right) Neil Armstrong, Edwin Aldrin, and Michael Collins, wearing space suits, leave the elevator after descending from the top of the launch tower. The three had just completed More

APOLLO XII - COUNTDOWN DEMONSTRATION TEST (CDDT) - KSC

S69-56596 (28 Oct. 1969) --- A nighttime, ground-level view of Pad A, Launch Complex 39, Kennedy Space Center (KSC) showing the Apollo 12 (Spacecraft 108/Lunar Module 6/Saturn 507) space vehicle, during the ter More

CAPE CANAVERAL, Fla. - The STS-125 crew heads for the Astrovan after suiting up in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. From left are Mission Specialists Michael Good, John Grunsfeld, Mike Massimino, Andrew Feustel and Megan McArthur, Pilot Gregory C. Johnson and Commander Scott Altman. The crew is heading for Launch Pad 39A where they will take part in a simulated launch countdown aboard space shuttle Atlantis. The countdown is the culmination of terminal countdown demonstration test, or TCDT, activities as preparation before launch. TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and the countdown. Atlantis’ STS-125 mission to service NASA’s Hubble Space Telescope is targeted for launch Oct. 14. Photo credit: NASA/Kim Shiflett KSC-08pd2884

CAPE CANAVERAL, Fla. - The STS-125 crew heads for the Astrovan after suiting up in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. From left are Mission Specialists Michael Go More

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Stanley Love awaits the final adjustments on his launch and entry suit, in astronaut crew quarters. The STS-122 crew is preparing for a simulated launch countdown aboard Atlantis, part of terminal countdown demonstration test, or TCDT, activities at NASA's Kennedy Space Center. The TCDT is a dress rehearsal for launch and also provides astronauts and ground crews with equipment familiarization and emergency egress training. On mission STS-122, Atlantis will deliver the Columbus module to the International Space Station. The European Space Agency's largest single contribution to the station, Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony. The laboratory will expand the research facilities aboard the station, providing crew members and scientists from around the world the ability to conduct a variety of experiments in the physical, materials and life sciences. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3408

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Stanley Love awaits the final adjustments on his launch and entry suit, in astronaut crew quarters. The STS-122 crew is prepari More

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Hans Schlegel puts on his helmet, part of his launch and entry suit, in astronaut crew quarters. Schlegel is with the European Space Agency. The STS-122 crew is preparing for a simulated launch countdown aboard Atlantis, part of terminal countdown demonstration test, or TCDT, activities at NASA's Kennedy Space Center. The TCDT is a dress rehearsal for launch and also provides astronauts and ground crews with equipment familiarization and emergency egress training. On mission STS-122, Atlantis will deliver the Columbus module to the International Space Station. The European Space Agency's largest single contribution to the station, Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony. The laboratory will expand the research facilities aboard the station, providing crew members and scientists from around the world the ability to conduct a variety of experiments in the physical, materials and life sciences. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3403

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Mission Specialist Hans Schlegel puts on his helmet, part of his launch and entry suit, in astronaut crew quarters. Schlegel is with the European S More

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-120 arrive at NASA's Kennedy Space Center Shuttle Landing Facility aboard T-38 jet aircraft to take part in terminal countdown demonstration test activities. Shuttle Launch Director Michael Leinbach shakes hands with Mission Specialist Stephanie Wilson, who will be making her second shuttle flight, as Commander Pam Melroy, at left, looks on. The terminal countdown demonstration test provides astronauts and ground crews an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. The STS-120 mission will deliver the U.S. Node 2 module, named Harmony, aboard space shuttle Discovery to the International Space Station. Launch of Discovery on mission STS-120 is targeted for Oct. 23 at 11:38 a.m. EDT on a 14-day mission to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-07pd2669

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-120 arrive at NASA's Kennedy Space Center Shuttle Landing Facility aboard T-38 jet aircraft to take part in terminal countdown demonstration test a More

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Pad 39A, a mission specialist on space shuttle Endeavour's STS-123 mission, Takao Doi of the Japan Aerospace Exploration Agency, prepares to take questions from the media during a break from emergency egress training. The crew is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test or TCDT. The terminal countdown demonstration test provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on a 16-day mission to the International Space Station. On the mission, Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0495

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Pad 39A, a mission specialist on space shuttle Endeavour's STS-123 mission, Takao Doi of the Japan Aerospace Exploration Agency, prepares to t More

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-119 Pilot Tony Antonelli is ready to practice driving the M-113 armored personnel carrier used for emergency escape, if needed, from Launch Pad 39A. The crew members are at Kennedy for prelaunch preparation known as terminal countdown demonstration test, or TCDT. The training provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and a simulated launch countdown. The crew of space shuttle Discovery is targeted to launch on the STS-119 mission Feb. 12. During Discovery's 14-day mission, the crew will install the S6 truss segment and solar arrays to the starboard side of the International Space Station, completing the station's truss, or backbone. Photo credit: NASA/Kim Shiflett KSC-2009-1202

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, STS-119 Pilot Tony Antonelli is ready to practice driving the M-113 armored personnel carrier used for emergency escape, if needed, from Launc More

KENNEDY SPACE CENTER, FLA. -- On NASA Kennedy Space Center's Launch Pad 39A, STS-123 Mission Specialists Garrett Reisman (left) and Robert L. Behnken look over the payload in space shuttle Endeavour's payload bay. They and other STS-123 crew members are at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test, or TCDT. The TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on the 16-day STS-123 mission to the International Space Station. Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0520

KENNEDY SPACE CENTER, FLA. -- On NASA Kennedy Space Center's Launch Pad 39A, STS-123 Mission Specialists Garrett Reisman (left) and Robert L. Behnken look over the payload in space shuttle Endeavour's payload More

KENNEDY SPACE CENTER, FLA. -- During emergency egress from Launch Pad 39A, STS-120 Pilot George Zamka and Commander Pamela Melroy are in one of the slidewire baskets. Zamka, at left, reaches for the release lever. The basket can carry them to a safe landing site below, if needed. The activity is part of the prelaunch terminal countdown demonstration test, or TCDT. The TCDT at NASA's Kennedy Space Center provides astronauts and ground crews an opportunity to participate in various launch preparation activities, including equipment familiarization and emergency training. The STS-120 mission will deliver the U.S. Node 2 module, named Harmony, aboard space shuttle Discovery to the International Space Station. Discovery is targeted to launch on its 14-day mission at 11:38 a.m. EDT on Oct. 23. Photo credit: NASA/Kim Shiflett KSC-07pd2805

KENNEDY SPACE CENTER, FLA. -- During emergency egress from Launch Pad 39A, STS-120 Pilot George Zamka and Commander Pamela Melroy are in one of the slidewire baskets. Zamka, at left, reaches for the release le More

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Pilot Alan Poindexter, strapped in his seat in Atlantis' cockpit, signals that he is ready to proceed with the simulated launch countdown. The exercise is part of terminal countdown demonstration test, or TCDT, activities at NASA's Kennedy Space Center. The TCDT is a dress rehearsal for launch and also provides astronauts and ground crews with equipment familiarization and emergency egress training. On mission STS-122, Atlantis will deliver the Columbus module to the International Space Station. The European Space Agency's largest single contribution to the station, Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony. The laboratory will expand the research facilities aboard the station, providing crew members and scientists from around the world the ability to conduct a variety of experiments in the physical, materials and life sciences. Atlantis' launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett KSC-07pd3441

KENNEDY SPACE CENTER, FLA. -- Space shuttle Atlantis STS-122 Pilot Alan Poindexter, strapped in his seat in Atlantis' cockpit, signals that he is ready to proceed with the simulated launch countdown. The exe More

KENNEDY SPACE CENTER, Fla. -- STS-118 Pilot Charlie Hobaugh suits up for the simulated launch countdown that concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton KSC-07pd1964

KENNEDY SPACE CENTER, Fla. -- STS-118 Pilot Charlie Hobaugh suits up for the simulated launch countdown that concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy More

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Shuttle Landing Facility, STS-123 Commander Dominic Gorie , left, and Pilot Gregory H. Johnson head for crew quarters following a practice session of space shuttle landings aboard NASA's Shuttle Training Aircraft, or STAs. The STA is a Grumman American Aviation-built Gulf Stream II jet that was modified to simulate an orbiter's cockpit, motion and visual cues, and handling qualities. In flight, the STA duplicates the orbiter's atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. Because the orbiter is unpowered during re-entry and landing, its high-speed glide must be perfectly executed the first time. The crew for space shuttle Endeavour's STS-123 mission is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test or TCDT. The terminal countdown demonstration test provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on a 16-day mission to the International Space Station. On the mission, Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett KSC-08pd0491

KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Shuttle Landing Facility, STS-123 Commander Dominic Gorie , left, and Pilot Gregory H. Johnson head for crew quarters following a practice session of More

PRELAUNCH - APOLLO 13 (ROLLOUT) - KSC

S70-32990 (24 March 1970) --- Nighttime, ground level view of Pad A, Launch Complex 39, Kennedy Space Center (KSC), showing the Apollo 13 (Spacecraft 109/Lunar Module 7/Saturn 508) space vehicle during Countdow More

Apollo 14 - Saturn Apollo Program

Apollo 14 Mission Commander, Alan B. Shepard, Jr., waves to well-wishers as he and astronauts Stuart A. Roosa, Command Module pilot; and Edgar D. Mitchell, Lunar Module pilot, walk to the transfer van during th More

View of Apollo 16 space vehicle at Pad A, Launch Complex 39

S72-34473 (29 March 1972) --- A ground-level view of Pad A, Launch Complex 39, Kennedy Space Center (KSC), showing the 363-feet tall Apollo 16 (Spacecraft 113/Lunar Module 11/Saturn 511) space vehicle during a More

SKYLAB (SL)-2 - COUNTDOWN DEMONSTRATION TEST (CDDT) - KSC

S73-25696 (15 May 1973) --- An overall view of Pad B, Launch Complex 39, Kennedy Space Center, Florida, showing the Skylab 2/Saturn 1B space vehicle during a Countdown Demonstration Test (CDDT). This is the lau More

KSC-75PC-0330. NASA public domain image. Kennedy space center.

CAPE CANAVERAL, Fla. – ASTP prime crewmen Donald Slayton, Thomas Stafford and Vance Brand pose with their Saturn IB launch vehicle following the Countdown Demonstration Test [CDDT], a step-by-step dress rehears More

STS-2 TRAINING - KSC. NASA public domain image. Kennedy space center.

S81-38547 (10 Sept. 1981) --- Astronauts Joe H. Engle, right, and Richard H. Truly, prime crew members for STS-2, complete their suiting up chores prior to a countdown demonstration test (CDDT). They are in the More

SIMULATED COUNTDOWN TRAINING ACTIVITIES - KSC

S82-28456 (19 Feb. 1982) --- Astronauts Jack R. Lousma, left, STS-3 commander, and C. Gordon Fullerton, pilot, are briefed on emergency procedures at Launch Pad 39A by Buck Tomlinson, a safety instructor with W More

SIMULATED COUNTDOWN TRAINING ACTIVITIES - STS-3 - KSC

S82-28457 (19 Feb. 1982) --- Member of the JSC astronaut corps., STS-3 vehicle integration test (VIT) team and other personnel pose for a photograph at the completion of a countdown demonstration test (CDDT) an More

Astronaut Corps, STS-4 vehicle integration test team and other personnel

S82-32201 (29 May 1982) --- Members of the JSC astronaut corps, vehicle integration test team (VITT) and other personnel pose for a photograph at the completion of a countdown demonstration test (CDDT) at Launc More

STS-4 crew takes break during CDDT for STS-4

Astronauts Thomas K. Mattingly, II., right, and Henry Hartsfield, Jr. pose for news photographers in front of the Space Shuttle vehicle during break in the countdown demonstration test (CDDT) for STS-4.

Astronaut Corps, STS-4 vehicle integration test team and other personnel

S82-32200 (29 May 1982) --- Members of the JSC astronaut corps, STS-4 vehicle integration test team (VITT) and other personnel pose for a photograph at the completion of a countdown demonstration test (CDDT) at More

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Barbara R. Morgan finishes suitup for the simulated launch countdown that concludes the terminal countdown demonstration test, or TCDT. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton KSC-07pd1967

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Barbara R. Morgan finishes suitup for the simulated launch countdown that concludes the terminal countdown demonstration test, or TCDT. Morgan joined N More

KENNEDY SPACE CENTER, Fla. -- After practicing emergency egress from Launch Pad 39A, STS-118 Mission Specialist Barbara R. Morgan and Commander Scott Kelly relax for a moment. Morgan, who is making her first space flight, joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. The crew is concluding the terminal countdown demonstration test. The STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton KSC-07pd2003

KENNEDY SPACE CENTER, Fla. -- After practicing emergency egress from Launch Pad 39A, STS-118 Mission Specialist Barbara R. Morgan and Commander Scott Kelly relax for a moment. Morgan, who is making her first More

KENNEDY SPACE CENTER, Fla. -- On top of the fixed service structure of Launch Pad 39A, The STS-118 crew poses for a photo after conclusion of the terminal countdown demonstration test. From left are Pilot Charlie Hobaugh, Mission Specialist Rick Mastracchio, Commander Scott Kelly, and Mission Specialists Tracy Caldwell, Barbara R. Morgan, Alvin Drew and Dave Williams. Morgan, who is making her first space flight, joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. Williams represents the Canadian Space Agency. The STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton KSC-07pd2004

KENNEDY SPACE CENTER, Fla. -- On top of the fixed service structure of Launch Pad 39A, The STS-118 crew poses for a photo after conclusion of the terminal countdown demonstration test. From left are Pilot C More

KENNEDY SPACE CENTER, Fla. -- After practicing emergency egress from Launch Pad 39A, STS-118 Mission Specialists Barbara R. Morgan and Dave Williams relax their launch and entry suits. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. Williams represents the Canadian Space Agency. The crew is concluding the terminal countdown demonstration test. The STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton KSC-07pd2002

KENNEDY SPACE CENTER, Fla. -- After practicing emergency egress from Launch Pad 39A, STS-118 Mission Specialists Barbara R. Morgan and Dave Williams relax their launch and entry suits. Morgan joined NASA's T More

STS-27 Atlantis, OV-104, terminal countdown demonstration test (TCDT) at KSC

S88-53088 (2 Dec. 1988) --- The STS-27 crew strides down the ramp from the Operations and Checkout Building at Kennedy Space Center to grab a van that will take the crew members to Launch Complex 39 for the Dec More

STS-27 Atlantis, OV-104, terminal countdown demonstration test (TCDT) at KSC

S88-53086 (17 Nov 1988) --- STS-27 Atlantis, Orbiter Vehicle (OV) 104, crewmembers participate in the terminal countdown demonstration test (TCDT) at the Kennedy Space Center (KSC). Standing in front of the M11 More

STS-27 Atlantis, OV-104, terminal countdown demonstration test (TCDT) at KSC

S88-53244 (14 Nov 1988) --- The crewmembers for STS-27 leave the operations and checkout (O&C) building en route to a transfer van that will take them to Launch Pad 39B for their terminal countdown demonstratio More

STS-28 Columbia, OV-102, terminal countdown demonstration test (TCDT) at KSC

S89-41093 (9 Aug 1989) --- STS-28 Columbia, Orbiter Vehicle (OV) 102, mission specialist David C. Leestma relaxes in chair after donning launch and entry suit (LES) and launch and entry helmet (LEH). Technician More

STS-34 crewmembers sit in M1-13 APC during emergency egress training at KSC

STS-34 crewmembers sit in M1-13 Armored Personnel Carrier (APC) during emergency egress training at KSC's shuttle landing facility (SLF) prior to terminal countdown demonstration test (TCDT) activities. Wearing More

STS-83 Crew Commander James Halsell (in T-38 cockpit) and other members of the STS-83 crew arrive at Kennedy Space Center's Shuttle Landing Facility in preparation for their /1997/40-97.htm">Terminal Countdown Demonstration Test.</a KSC-97pc413

STS-83 Crew Commander James Halsell (in T-38 cockpit) and other members of the STS-83 crew arrive at Kennedy Space Center's Shuttle Landing Facility in preparation for their kscpao/release/1997/40-97.htm">Termi More

STS-83 Pilot Susan Still (emerging from T-38 cockpit) and other members of the STS-83 crew arrive at Kennedy Space Center's Shuttle Landing Facility in preparation for their /1997/40-97.htm">Terminal Countdown Demonstration Test.</a KSC-97pc414

STS-83 Pilot Susan Still (emerging from T-38 cockpit) and other members of the STS-83 crew arrive at Kennedy Space Center's Shuttle Landing Facility in preparation for their kscpao/release/1997/40-97.htm">Termi More

Six of the seven astronauts assigned to the STS-83 crew arrive at Kennedy Space Center's Shuttle Landing Facility in preparation for their /1997/40-97.htm">Terminal Countdown Demonstration Test.</a> From left to right, they are Payload Specialist Roger K. Crouch, Pilot Susan L. Still, Mission Commander James D. Halsell, Mission Specialist Michael L. Gernhardt, Payload Specialist Gregory T. Linteris, and Mission Specialist Janice E. Voss KSC-97pc415

Six of the seven astronauts assigned to the STS-83 crew arrive at Kennedy Space Center's Shuttle Landing Facility in preparation for their kscpao/release/1997/40-97.htm">Terminal Countdown Demonstration Test.</ More

The STS-83 crew poses in the White Room at Launch Complex 39A during the crew's /1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a> From left to right, standing, they are Payload Specialist Gregory T. Linteris, Pilot Susan L. Still, Mission Commander James D. Halsell, Mission Specialist Michael L. Gernhardt, Payload Specialist Roger K. Crouch, and Mission Specialists Donald Thomas and Janice E. Voss. Cady Coleman, the backup Mission Specialist for Donald Thomas, is kneeling on the right KSC-97pc457

The STS-83 crew poses in the White Room at Launch Complex 39A during the crew's kscpao/release/1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a> From left to right, standing, they are Payload Sp More

The STS-83 crew poses at Launch Complex 39A during their /1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a KSC-97pc461

The STS-83 crew poses at Launch Complex 39A during their kscpao/release/1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a

The STS-83 crew poses in the White Room at Launch Complex 39A during the crew's /1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a> From left to right, standing, they are Payload Specialist Gregory T. Linteris, Pilot Susan L. Still, Mission Commander James D. Halsell, Mission Specialist Michael L. Gernhardt, Payload Specialist Roger K. Crouch, and Mission Specialist Donald Thomas. Mission Specialist Janice E. Voss is kneeling KSC-97pc458

The STS-83 crew poses in the White Room at Launch Complex 39A during the crew's kscpao/release/1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a> From left to right, standing, they are Payload Sp More

STS-83 Payload Specialist Gregory T. Linteris, Mission Specialist Janice E. Voss, and Payload Specialist Roger K. Crouch participate in emergency egress training at Launch Complex 39A during the crew's /1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a> They are seen here in one of the pads' seven <a href="http://www-pao.ksc.nasa.gov/kscpao/nasafact/pads.htm#emergenc">slidewire baskets.</a KSC-97pc455

STS-83 Payload Specialist Gregory T. Linteris, Mission Specialist Janice E. Voss, and Payload Specialist Roger K. Crouch participate in emergency egress training at Launch Complex 39A during the crew's kscpao/r More

The STS-83 crew poses for the media at Launch Complex 39A during the crew's /1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a> From left to right, they are Mission Commander James D. Halsell; Pilot Susan L. Still; Mission Specialists Michael L. Gernhardt, Donald Thomas, and Janice E. Voss; and Payload Specialists Roger K. Crouch and Gregory T. Linteris KSC-97pc456

The STS-83 crew poses for the media at Launch Complex 39A during the crew's kscpao/release/1997/40-97.htm">Terminal Countdown Demonstration Test (TCDT).</a> From left to right, they are Mission Commander James More