KENNEDY SPACE CENTER, FLA. - STS-121 Mission Commander Steven Lindsey talks to the media from the launch pad. He is in the landing area of the slidewire baskets. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - The STS-121 crew pause in their prelaunch activities to talk to the media. They are standing in the landing area of the slidewire baskets. With the microphone is Pilot Mark Kelly. The crew members are (from left) Mission Specialists Michael Fossum and Lisa Nowak, Kelly, Commander Steven Lindsey, and Mission Specialists Stephanie Wilson, Piers Sellers and Thomas Reiter of Germany, who represents the European Space Agency. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - The STS-121 crew pause in their prelaunch activities to talk to the media, gathered at left. They are standing in the landing area of the slidewire baskets. The crew members facing them are (from left) Mission Specialists Thomas Reiter of Germany, who represents the European Space Agency, Piers Sellers, Stephanie Wilson, Commander Steven Lindsey, Pilot Mark Kelly, and Mission Specialists Lisa Nowak and Michael Fossum. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - The STS-121 crew pause in their prelaunch activities to talk to the media. They are standing in the landing area of the slidewire baskets. At the microphone is Commander Steven Lindsey. Behind him are (from left) Mission Specialists Michael Fossum and Lisa Nowak, Pilot Mark Kelly and Mission Specialists Stephanie Wilson, Piers Sellers and Thomas Reiter of Germany, who represents the European Space Agency. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Specialist Thomas Reiter prepares to leap from the slidewire basket during training on emergency egress procedures from the launch pad. Above him is Mission Specialist Piers Sellers; at lower left is Mission Specialist Stephanie Wilson. 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

KENNEDY SPACE CENTER, FLA. - During a pause in their prelaunch activities at the pad, the STS-121 crew talk to the media. They are standing in the landing area of the slidewire baskets. With the microphone is Mission Specialist Piers Sellers. Next to him are Mission Specialists Stephanie Wilson and Thomas Reiter of Germany, who represents the European Space Agency. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - The STS-121 crew pause in their prelaunch activities to talk to the media. They are standing in the landing area of the slidewire baskets. With the microphone is Mission Specialist Piers Sellers. The crew members are (from left) Mission Specialists Michael Fossum and Lisa Nowak, Pilot Mark Kelly, Commander Steven Lindsey, and Mission Specialists Stephanie Wilson, Sellers, and Thomas Reiter of Germany, who represents the European Space Agency. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

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

KENNEDY SPACE CENTER, FLA. - During a pause in their prelaunch activities at the pad, the STS-121 crew talk to the media. They are standing in the landing area of the slidewire baskets. With the microphone is Mission Specialist Stephanie Wilson. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - The STS-121 crew listens to instructions on emergency egress from the pad. The crew members are (from left) Pilot Mark Kelly, Mission Specialists Piers Sellers, Lisa Nowak, Stephanie Wilson and Thomas Reiter, Commander Steven Lindsey, and Mission Specialist Michael Fossum. Reiter is from Germany and represents the European Space Agency. 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

KENNEDY SPACE CENTER, FLA. - During emergency egress training at the pad, STS-121 crew members Piers Sellers, Stephanie Wilson and Thomas Reiter, all mission specialists, learn how to exit the slidewire basket on the ground. 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

KENNEDY SPACE CENTER, FLA. - The STS-121 crew pose for the media, concluding a press conference held in the landing area of the slidewire baskets. The crew members facing them are (from left) The crew members are (from left) Mission Specialists Michael Fossum and Lisa Nowak, Pilot Mark Kelly, Commander Steven Lindsey, and Mission Specialists Stephanie Wilson, Piers Sellers and Thomas Reiter of Germany, who represents the European Space Agency. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - During emergency egress training at the pad, STS-121 Mission Specialist Stephanie Wilson prepares to jump to the ground from the slidewire basket in the landing area. Helping her above are Mission Specialists Piers Sellers and Thomas Reiter. 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

KENNEDY SPACE CENTER, FLA. - Some of the STS-121 crew practices getting into a slidewire basket on Launch Pad 39B while others watch. In the basket are Mission Specialists Piers Sellers, Stephanie Wilson and Thomas Reiter. Behind them are Commander Steven Lindsey, Mission Specialists Lisa Nowak and Michael Fossum, and Pilot Mark Kelly. 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

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

KENNEDY SPACE CENTER, FLA. - The STS-121 crew pause in their prelaunch activities to talk to the media, gathered at left. They are standing in the landing area of the slidewire baskets. The crew members facing them are (from left) Mission Specialists Thomas Reiter of Germany, who represents the European Space Agency, Piers Sellers, Stephanie Wilson, Commander Steven Lindsey, Pilot Mark Kelly, and Mission Specialists Lisa Nowak and Michael Fossum. The crew is at Kennedy for Terminal Countdown Demonstration Test activities. 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

KENNEDY SPACE CENTER, FLA. - During emergency egress training at the pad, the STS-121 crew pose for a photo on the upper level in front of Space Shuttle Discovery's external tank. From left are Mission Specialists Piers Sellers, Thomas Reiter and Lisa Nowak, Commander Steven Lindsey, Mission Specialist Stephanie Wilson, Pilot Mark Kelly and 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

KENNEDY SPACE CENTER, FLA. - During emergency egress training at the pad, the STS-121 crew poses for a photo on the upper level. From left are Mission Specialist Thomas Reiter, Commander Steven Lindsey, Pilot Mark Kelly, and Mission Specialists Stephanie Wilson, Michael Fossum, Lisa Nowak and Piers Sellers. Behind them can be seen the top of a solid rocket booster and the external tank, part of the configuration for Space Shuttle Discovery. 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