KENNEDY SPACE CENTER, FLA. -- During Terminal Countdown Demonstration Test activities, the STS-112 crew poses for a group photo near the launch pad where Space Shuttle Atlantis waits for launch. Standing left to right are Mission Specialist Piers Sellers, Commander Jeffrey Ashby, Mission Specialist David Wolf, Pilot Pamela Melroy, and Mission Specialists Sandra Magnus and Fyodor Yurchikhin, who is with the Russian Space Agency. The TCDT includes emergency egress training and a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- STS-112 Commander Jeffrey Ashby, Mission Specialist Sandra Magnus, and Pilot Pamela Melroy take a momentary break from training at Pad 39B during Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- In the White Room at Launch Pad 39B, STS-112 Commander Jeffrey Ashby receives assistance with his spacesuit during a simulated launch countdown, part of Terminal Countdown Demonstration Test activities, a dress rehearsal for launch. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, which will be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- STS-112 Mission Specialist David Wolf, M.D., takes a break from training at Pad 39B during Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The STS-112 crew listen to further instructions about emergency egress from the Shuttle. Standing, left to right, are Mission Specialist Piers Sellers, Commander Jeffrey Ashby, Pilot Pamela Melroy, Mission Specialists Fyodor Yurchikhin (with the Russian Space Agency), David Wolf and Sandra Magnus. The training is part of Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- In the White Room at Launch Pad 39B, STS-112 Pilot Pamela Melroy adjusts her spacesuit during a simulated launch countdown, part of Terminal Countdown Demonstration Test activities, a dress rehearsal for launch. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, which will be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- STS-112 Mission Specialist Piers Sellers takes a break during emergency egress practice on the 195-foot level of the Fixed Service Structure, Launch Pad 39B. He and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- STS-112 Commander Jeffrey Ashby takes a break during emergency egress practice on the 195-foot level of the Fixed Service Structure, Launch Pad 39B. He and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The STS-112 crew pauses for a photo in the White Room during Terminal Countdown Demonstration Test activities. From left, clockwise, are Mission Specialists Piers Sellers and Sandra Magnus, Pilot Pamela Melroy, Commander Jeffrey Ashby and Mission Specialists Fyodor Yurchikhin and David Wolf. Ashby is holding the mission insignia. Yurchikhin is with the Russian Space Agency. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- Sitting in a slidewire basket on the 195-foot level of the Fixed Service Structure, Launch Pad 39B, are STS-112 Mission Specialists Fyodor Yurchikhin (left) and David Wolf. They and the rest of the crew are practicing emergency egress from the pad during Terminal Countdown Demonstration Test activities. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- STS-112 Mission Specialist Sandra Magnus takes a break during emergency egress practice on the 195-foot level of the Fixed Service Structure, Launch Pad 39B. She and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The payload bay doors of Space Shuttle Atlantis close on the primary payloads for mission STS-112. The Shuttle is carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, plus the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. Launch of Atlantis is scheduled for Oct. 2 with a crew of six. The 11-day mission includes three spacewalks.

KENNEDY SPACE CENTER, FLA. -- During emergency egress training from the launch pad, the STS-112 crew get instructions on using the slidewire basket. From left, Mission Specialist Piers Sellers (back to camera), Pilot Pamela Melroy, Mission Specialists Sandra Magnus and Fyodor Yurchikhin (with the Russian Space Agency), watch as Commander Jeffrey Ashby (below right) grabs the release lever. Not seen is Mission Specialist David Wolf. The training is part of Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The STS-112 crew pauses for a photo in the White Room during Terminal Countdown Demonstration Test activities. Kneeling in front are Mission Specialists Piers Sellers and David Wolf; standing, left to right, are Mission Specialist Sandra Magnus, Pilot Pamela Melroy, Commander Jeffrey Ashby and Mission Specialist Fyodor Yurchikhin. (with the Russian Space Agency). Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. - STS-112 Pilot Pamela Melroy (left) and Commander Jeffrey Ashby hurry toward the slidewire baskets on the 195-foot level of the Fixed Service Structure, Launch Pad 39B. They and the rest of the crew are practicing emergency egress from the pad during Terminal Countdown Demonstration Test activities. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The payload for mission STS-112 rests inside the payload bay of Space Shuttle Atlantis. The Shuttle is carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, plus the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. Launch of Atlantis is scheduled for Oct. 2 with a crew of six. The 11-day mission includes three spacewalks.

KENNEDY SPACE CENTER, FLA. -- -- The payload for mission STS-112 rests inside the payload bay of Space Shuttle Atlantis. The Shuttle is carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, plus the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. Launch of Atlantis is scheduled for Oct. 2 with a crew of six. The 11-day mission includes three spacewalks.

KENNEDY SPACE CENTER, FLA. -- The STS-112 crew listen to further instructions about emergency egress from the Shuttle using the slidewire basket. In the basket are Mission Specialists Sandra Magnus, Fyodor Yurchikhin (with the Russian Space Agency), and Piers Sellers. At left are Mission Specialist David Wolf and Pilot Pamela Melroy; at right is Commander Jeffrey Ashby. The training is part of Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. - During emergency egress practice on the 195-foot level of the Fixed Service Structure, Launch Pad 39B, STS-112 Mission Specialist Sandra Magnus opens her helmet visor. She and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- In the foreground, STS-112 Pilot Pamela Melroy (left), Mission Specialist Fyodor Yurchikhin (center) and Commander Jeffrey Ashby (right) watch as a slidewire basket descends to the landing area. The crew is taking part in emergency egress training from the pad, part of Terminal Countdown Demonstration Test activities. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- Sitting in a slidewire basket on the 195-foot level of the Fixed Service Structure, Launch Pad 39B, are STS-112 Mission Specialists Fyodor Yurchikhin (left) and David Wolf. They and the rest of the crew are practicing emergency egress from the pad during Terminal Countdown Demonstration Test activities. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- STS-112 Mission Specialist David Wolf takes a break during emergency egress practice on the 195-foot level of the Fixed Service Structure, Launch Pad 39B. He and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. - STS-112 Pilot Pamela Melroy takes a break during emergency egress practice on the 195-foot level of the Fixed Service Structure, Launch Pad 39B. She and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The STS-112 crew heads for the Astrovan and a ride to the launch pad for a simulated countdown. From left are Mission Specialists Fyodor Yurchikhin (RSA), David Wolf and Piers Sellers; Pilot Pamela Melroy; Mission Specialist Sandra Magnus; and Commander Jeffrey Ashby. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- -- The payload for mission STS-112 rests inside the payload bay of Space Shuttle Atlantis. The Shuttle is carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, plus the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. Launch of Atlantis is scheduled for Oct. 2 with a crew of six. The 11-day mission includes three spacewalks.

KENNEDY SPACE CENTER, FLA. - STS-112 Mission Specialist Fyodor Yurchikhin (with the Russian Space Agency) takes a break during emergency egress practice on the 195-foot level of the Fixed Service Structure, Launch Pad 39B. He and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. - The STS-112 crew gathers for a group photo on the 215-foot level of the Fixed Service Structure. From left are Mission Specialists Fyodor Yurchikhin, Piers Sellers and David Wolf; Pilot Pamela Melroy; Commander Jeffrey Ashby; and Mission Specialist Sandra Magnus. Behind them at left is seen one of the white solid rocket boosters and the orange external tank on Space Shuttle Atlantis. Mission STS-112 is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. The 11-day mission is expected to conclude with a landing at KSC Oct. 13.

KENNEDY SPACE CENTER, FLA. -- During emergency egress training from the launch pad, the STS-112 crew look at the slidewire basket. Seen here are, left to right, Commander Jeffrey Ashby, Pilot Pamela Melroy and Mission Specialists Sandra Magnus and Fyodor Yurchikhin (with the Russian Space Agency). Not seen are Mission Specialists Piers Sellers and David Wolf. The training is part of Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- Members of the STS-112 crew stand inside a slidewire basket, a component of the emergency egress system at the pad. From left are Mission Specialists Sandra Magnus, Fyodor Yurchikhin (with the Russian Space Agency), and Piers Sellers. The training is part of Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- In the White Room at Launch Pad 39B, STS-112 Mission Specialist Sandra Magnus, Ph.D., receives assistance with her spacesuit during a simulated launch countdown, part of Terminal Countdown Demonstration Test activities, a dress rehearsal for launch. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, which will be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- In the White Room at Launch Pad 39B, STS-112 Mission Specialist Piers Sellers, Ph.D., prepares to enter Space Shuttle Atlantis during a simulated launch countdown, part of Terminal Countdown Demonstration Test activities, a dress rehearsal for launch. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, which will be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- Sitting in a slidewire basket on the 195-foot level of the Fixed Service Structure, Launch Pad 39B, are STS-112 Commander Jeffrey Ashby (left foreground) and Pilot Pamela Melroy. They and the rest of the crew are practicing emergency egress from the pad during Terminal Countdown Demonstration Test activities. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- In the White Room at Launch Pad 39B, STS-112 Mission Specialist Fyodor Yurchikhin, Ph.D., a cosmonaut with the Russian Space Agency, receives assistance with his spacesuit during a simulated launch countdown, part of Terminal Countdown Demonstration Test activities, a dress rehearsal for launch. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, which will be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The payload for mission STS-112 rests inside the payload bay of Space Shuttle Atlantis. The Shuttle is carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, plus the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. Launch of Atlantis is scheduled for Oct. 2 with a crew of six. The 11-day mission includes three spacewalks.

KENNEDY SPACE CENTER, FLA. -- STS-112 Pilot Pamela Melroy takes a break from training at Pad 39B during Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. - STS-112 Mission Specialist Sandra Magnus (left) sits in the slidewire basket basket on the 195-foot level of the Fixed Service Structure, Launch Pad 39B, while Mission Specialist Piers Sellers (right) reaches for the release lever. They and the rest of the crew are practicing emergency egress from the pad during Terminal Countdown Demonstration Test activities. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- During emergency egress training from the launch pad, the STS-112 crew listens to a trainer about use of the system. The crew members are, from left in the center, Commander Jeffrey Ashby, Mission Specialists Sandra Magnus, Piers Sellers and Fyodor Yurchikhin; and Pilot Pamela Melroy. In the foreground, left, is Mission Specialist David Wolf. Yurchikhin is with the Russian Space Agency. The training is part of Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.

KENNEDY SPACE CENTER, FLA. -- The STS-112 crew strides out of the Checkout and Operations Building on their way to the launch pad and a simulated countdown. On the left, front to back, are Pilot Pamela Melroy and Mission Specialists David Wolf and Fyodor Yurchikhin (RSA). On the right, front to back, are Commander Jeffrey Ashby and Mission Specialists Sandra Magnus and Piers Sellers. Mission STS-112 aboard Space Shuttle Atlantis is scheduled to launch no earlier than Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.