Astronauts Piers J. Sellers (left ) and David A. Wolf work on the newly installed Starboard One (S1) truss to the International Space Station (ISS) during the STS-112 mission. The primary payloads of this mission, ISS Assembly Mission 9A, were the Integrated Truss Assembly S1 (S One), the starboard side thermal radiator truss, and the Crew Equipment Translation Aid (CETA) cart to the ISS. The S1 truss provides structural support for the orbiting research facility's radiator panels, which use ammonia to cool the Station's complex power system. The S1 truss was attached to the S0 (S Zero) truss, which was launched on April 8, 2002 aboard the STS-110, and flows 637 pounds of anhydrous ammonia through three heat-rejection radiators. The truss is 45-feet long, 15-feet wide, 10-feet tall, and weighs approximately 32,000 pounds. The CETA cart was attached to the Mobil Transporter and will be used by assembly crews on later missions. Manufactured by the Boeing Company in Huntington Beach, California, the truss primary structure was transferred to the Marshall Space Flight Center in February 1999 for hardware installations and manufacturing acceptance testing. The launch of the STS-112 mission occurred on October 7, 2002, and its 11-day mission ended on October 18, 2002.

S119-E-007274 (23 March 2009) --- Astronauts Richard Arnold (bottom) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007298 (23 March 2009) --- Astronauts Richard Arnold (left) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007243 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007266 (23 March 2009) --- Astronauts Richard Arnold (bottom) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007270 (23 March 2009) --- Astronauts Richard Arnold (bottom) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007278 (23 March 2009) --- Astronauts Richard Arnold (right) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007332 (23 March 2009) --- Astronauts Richard Arnold (right) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007257 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007259 (23 March 2009) --- Astronauts Richard Arnold (left) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007311 (23 March 2009) --- Astronauts Richard Arnold (bottom) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007312 (23 March 2009) --- Astronauts Richard Arnold (bottom) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007323 (23 March 2009) --- Astronauts Richard Arnold (right) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007302 (23 March 2009) --- Astronauts Richard Arnold (left) and Joseph Acaba, both STS-119 mission specialists, participate in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Acaba helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007237 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

STS113-714-033 (26-30 November 2002) --- Astronauts Michael E. Lopez-Alegria (right) and John B. Herrington, STS-113 mission specialists, work near the Crew and Equipment Translation Aid (CETA) cart on a truss on the International Space Station (ISS) during a scheduled spacewalk for the mission.

STS113-714-024 (26-30 November 2002) --- Astronauts Michael E. Lopez-Alegria (right) and John B. Herrington, STS-113 mission specialists, work near the Crew and Equipment Translation Aid (CETA) cart on a truss on the International Space Station (ISS) during a scheduled spacewalk for the mission.

KENNEDY SPACE CENTER, FLA. - STS-113 Mission Specialists John Herrington (left) and Michael Lopez-Alegria (right) look over the P1 Integrated Truss Structure, the primary payload for the mission. The P1 truss will be attached to the central truss segment, S0 Truss, during spacewalks. The payload also includes the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. STS-113 is scheduled to launch Oct. 6, 2002.

KENNEDY SPACE CENTER, FLA. -- STS-113 Mission Specialists John Herrington (left) and Michael Lopez-Alegria (right) look over the P1 Integrated Truss Structure, the primary payload for the mission. The P1 truss will be attached to the central truss segment, S0 Truss, during spacewalks. The payload also includes the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. STS-113 is scheduled to launch Oct. 6, 2002

KENNEDY SPACE CENTER, FLA. -- STS-113 Mission Specialist Michael Lopez-Alegria looks over the P1 Integrated Truss Structure, the primary payload for the mission. The P1 truss will be attached to the central truss segment, S0 Truss, during spacewalks. The payload also includes the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. STS-113 is scheduled to launch Oct. 6, 2002.

KENNEDY SPACE CENTER, FLA. - STS-113 Mission Specialists Michael Lopez-Alegria (left) and John Herrington (center) review data on the P1 Integrated Truss Structure with a technician in the Space Station Processing Facility. During the mission, the P1 truss will be attached to the central truss segment, S0 Truss, during spacewalks. The payload also includes the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. STS-113 is scheduled to launch Oct. 6, 2002.

KENNEDY SPACE CENTER, FLA. -- The brilliance of the launch of Space Shuttle Atlantis is reflected in nearby waters. Liftoff of the Shuttle on mission STS-112 occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- The brilliance of the launch of Space Shuttle Atlantis is reflected in nearby waters. Liftoff of the Shuttle on mission STS-112 occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

During their STS-37 extravehicular activity (EVA), Mission Specialist (MS) Jerry L. Ross (left) and MS Jerome Apt, in the aft section of Atlantis', Orbiter Vehicle (OV) 104's, payload bay (PLB), turn and wave to their fellow crewmembers who are overseeing the activity from inside the crew compartment. Ross is tethered to the guidewire running along the PLB port side. Apt has reached the end of the Crew and Equipment Translation Aid (CETA) deployable track via the manual hand over hand cart.

S116-E-06275 (14 Dec. 2006) --- With his feet secured on the Canadarm2, European Space Agency astronaut Christer Fuglesang, STS-116 mission specialist, works to relocate one of the two Crew Equipment Translation Aid (CETA) carts during EVA 2 on Dec. 14. Astronaut Robert L. Curbeam Jr., who is sharing two spacewalks with Fuglesang on this flight, is out of frame.

S116-E-06279 (14 Dec. 2006) --- With his feet secured on the Canadarm2, European Space Agency astronaut Christer Fuglesang, STS-116 mission specialist, works to relocate one of the two Crew Equipment Translation Aid (CETA) carts during EVA 2 on Dec. 14. Astronaut Robert L. Curbeam Jr., who is sharing two spacewalks with Fuglesang on this flight, is out of frame.

STS113-310-023 (28 November 2002) --- Astronaut John B. Herrington, STS-113 mission specialist, anchored on the mobile foot restraint on the International Space Station’s (ISS) Canadarm2, moves the Crew and Equipment Translation Aid (CETA) during the mission’s second scheduled spacewalk. The final major task of the spacewalk was the relocation of the CETA cart from the Port One (P1) to the Starboard One (S1) Truss, which will allow the Mobile Transporter to move along the P1 to assist in upcoming assembly missions.

S89-46985 (October 1989) --- Astronauts Jerry L Ross and Jerome (Jay) Apt, STS-37 mission specialists, practice a spacewalk they will perform on that flight. The experiment uses an electrically powered version of the Crew and Equipment Translation Aid (CETA), a type of railroad handcart planned as a spacewalker's transportation system along the truss of Space Station Freedom. Apt is pulling Ross along to test the cart's ability to carry a person plus cargo.

KENNEDY SPACE CENTER, FLA. -- STS-113 Pilot Paul Lockhart checks the cockpit window from inside Endeavour. The check is part of Crew Equipment Interface Test activities, which include familiarization with equipment for the mission. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss, to be attached to the central truss segment, S0, on the International Space Station, and the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. Once delivered, the P1 truss will remain stowed until flight 12A.1. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth. Space Shuttle Endeavour is scheduled to launch Nov. 10 on the 11-day mission.

KENNEDY SPACE CENTER, FLA. -- As part of Crew Equipment Interface Test activities, STS-113 Mission Specialist John Herrington looks over paperwork for equipment in Endeavour that will be carried on the mission. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss, to be attached to the central truss segment, S0, on the International Space Station, and the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. Once delivered, the P1 truss will remain stowed until flight 12A.1. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth. Space Shuttle Endeavour is scheduled to launch Nov. 10 on the 11-day mission.

KENNEDY SPACE CENTER, FLA. -- As part of Crew Equipment Interface Test activities, STS-113 Mission Specialists John Herrington (left) and Michael Lopez-Alegria (center) practice working with equipment in Endeavour. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss, to be attached to the central truss segment, S0, on the International Space Station, and the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. Once delivered, the P1 truss will remain stowed until flight 12A.1. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth. Space Shuttle Endeavour is scheduled to launch Nov. 10 on the 11-day mission.

KENNEDY SPACE CENTER, FLA. - STS-113 Commander James Wetherbee (left) andPilot Paul Lockhart (right) look over equipment inside Endeavour as part of Crew Equipment Interface Test activities. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss, to be attached to the central truss segment, S0, on the International Space Station, and the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. Once delivered, the P1 truss will remain stowed until flight 12A.1. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth. Space Shuttle Endeavour is scheduled to launch Nov. 10 on the 11-day mission.

KENNEDY SPACE CENTER, FLA. -- As part of Crew Equipment Interface Test activities, STS-113 Mission Specialists Michael Lopez-Alegria (left) and John Herrington (right) practice working with flight equipment in Endeavour. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss, to be attached to the central truss segment, S0, on the International Space Station, and the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. Once delivered, the P1 truss will remain stowed until flight 12A.1. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth. Space Shuttle Endeavour is scheduled to launch Nov. 10 on the 11-day mission.

KENNEDY SPACE CENTER, FLA. - As part of Crew Equipment Interface Test activities, STS-113 Mission Specialists Michael Lopez-Alegria (left) and John Herrington (center) look over equipment that will be carried on the mission. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss, to be attached to the central truss segment, S0, on the International Space Station, and the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. Once delivered, the P1 truss will remain stowed until flight 12A.1. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth. Space Shuttle Endeavour is scheduled to launch Nov. 10 on the 11-day mission.

KENNEDY SPACE CENTER, FLA. -- STS-113 Commander James Wetherbee checks the cockpit window from inside Endeavour. The check is part of Crew Equipment Interface Test activities, which include familiarization with equipment for the mission. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss, to be attached to the central truss segment, S0, on the International Space Station, and the Crew and Equipment Translation Aid (CETA) Cart B that can be used by spacewalkers to move along the truss with equipment. Once delivered, the P1 truss will remain stowed until flight 12A.1. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth. Space Shuttle Endeavour is scheduled to launch Nov. 10 on the 11-day mission.

KENNEDY SPACE CENTER, FLA. - -- Space Shuttle Atlantis begins its journey to the International Space Station (ISS) as it lifts off from Launch Pad 39B on mission STS-112. Liftoff occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the Space Station. 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- Rising clouds of smoke and steam appear to surround Space Shuttle Atlantis as it hurtles toward space on mission STS-112. Liftoff occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss. [Photo courtesy of Scott Andrews]

KENNEDY SPACE CENTER, FLA. - -- In the White Room at Launch Pad 39B, STS-112 Mission Specialist Sandra H. Magnus, Ph.D., receives assistance with her spacesuit before boarding Space Shuttle Atlantis. Liftoff is schedued for 3:46 p.m. EDT. Along with a crew of six, Atlantis will carry the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. - Space Shuttle Atlantis leaps from the steam and smoke billowing across Launch Pad 39B after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- STS-113 Mission Specialist Michael Lopez-Alegria arrives at KSC for Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. The primary payloads on mission STS-113 are the first port truss segment, P1, and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. Also onboard Space Shuttle Endeavour will be the Expedition 6 crew who will replace Expedition 5, returning to Earth after 4 months. The STS-113 launch is scheduled for Nov. 10, 2002.

KENNEDY SPACE CENTER, FLA. - A distant view creates a frame of leaves around the launch of Space Shuttle Atlantis on mission STS-112. Liftoff occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss and CETA Cart A.

KENNEDY SPACE CENTER, FLA. - Space Shuttle Atlantis leaps clear of the billowing steam and smoke on Launch Pad 39B after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss. [Photo courtesy of Scott Andrews]

KENNEDY SPACE CENTER, FLA. - The afternoon sun casts a shadow on Space Shuttle Atlantis as it launches on its journey to the International Space Station. Liftoff occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss and CETA cart.

KENNEDY SPACE CENTER, FLA. - -- In the White Room at Launch Pad 39B, STS-112 Mission Specialist Piers J. Sellers, Ph.D., receives assistance with his spacesuit before boarding Space Shuttle Atlantis. Liftoff is schedued for 3:46 p.m. EDT. Along with a crew of six, Atlantis will carry the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- The brilliance of the launch of Space Shuttle Atlantis is reflected in nearby waters. Liftoff of the Shuttle on mission STS-112 occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss. [Photo courtesy of Scott Andrews]

KENNEDY SPACE CENTER, FLA. - With a tail of flame burning white hot, Space Shuttle Atlantis leaps from the billowing steam and smoke on Launch Pad 39B after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

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. -- 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. -- Space Shuttle Atlantis leaps from the steam and smoke billowing across Launch Pad 39B after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss. [Photo courtesy of Scott Andrews]

KENNEDY SPACE CENTER, FLA. - Space Shuttle Atlantis leaps clear of the billowing steam and smoke on Launch Pad 39B after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. - -- In the White Room at Launch Pad 39B, STS-112 Mission Specialist David A. Wolf, M.D., receives assistance with his spacesuit before boarding Space Shuttle Atlantis. Liftoff is schedued for 3:46 p.m. EDT. Along with a crew of six, Atlantis will carry the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. - -- Space Shuttle Atlantis leaves a billowingclouds of smoke and steam behind just after liftoff from Launch Pad 39B on mission STS-112. Liftoff occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

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. - -- In the White Room at Launch Pad 39B, STS-112 Commander Jeffrey Ashby receives assistance with his spacesuit before boarding Space Shuttle Atlantis. Liftoff is schedued for 3:46 p.m. EDT. Along with a crew of six, Atlantis will carry the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. - From the Payload Changeout Room on Launch Pad 39A, the P1 truss payload, plus the Crew and Equipment Translation Aid (CETA) cart B, are moved into the payload bay of Space Shuttle Endeavour. Scheduled to launch Nov. 10 on mission STS-113, Endeavour will make the 16th assembly flight to the International Space Station. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. -- The brilliance of the launch of Space Shuttle Atlantis is reflected in nearby waters. Liftoff of the Shuttle on mission STS-112 occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss. [Photo courtesy of Scott Andrews]

KENNEDY SPACE CENTER, FLA. - Space Shuttle Atlantis leaps from the steam and smoke billowing across Launch Pad 39B after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- A worker in the Payload Changeout Room on Launch Pad 39A watches as the P1 truss payload, plus the Crew and Equipment Translation Aid (CETA) cart B, move into the payload bay of Space Shuttle Endeavour. Scheduled to launch Nov. 10 on mission STS-113, Endeavour will make the 16th assembly flight to the International Space Station. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. -- Twin columns of white flames from the solid rocket boosters propel Space Shuttle Atlantis toward space after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss. [Photo courtesy of Scott Andrews]

KENNEDY SPACE CENTER, FLA. - -- In the White Room at Launch Pad 39B, STS-112 Mission Specialist Fyodor N. Yurchikhin, Ph.D., a cosmonaut with the Russian Space Agency, receives assistance with his spacesuit before boarding Space Shuttle Atlantis. Liftoff is schedued for 3:46 p.m. EDT. Along with a crew of six, Atlantis will carry the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- STS-113 Pilot Paul Lockhart arrives at KSC for Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. The primary payloads on mission STS-113 are the first port truss segment, P1, and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. Also onboard Space Shuttle Endeavour will be the Expedition 6 crew who will replace Expedition 5, returning to Earth after 4 months. The STS-113 launch is scheduled for Nov. 10, 2002. .

KENNEDY SPACE CENTER, FLA. - -- In the White Room at Launch Pad 39B, STS-112 Pilot Pamela Ann Melroy receives assistance with her spacesuit before boarding Space Shuttle Atlantis. Liftoff is schedued for 3:46 p.m. EDT. Along with a crew of six, Atlantis will carry the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

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. -- With a tail of flame burning white hot, Space Shuttle Atlantis leaps from the billowing steam and smoke on Launch Pad 39B after an on-time liftoff of 3:46 p.m. EDT on mission STS-112. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss. [Photo courtesy of Scott Andrews]

KENNEDY SPACE CENTER, FLA. - -- Space Shuttle Atlantis roars toward the clear blue sky and space as it begins its journey to the International Space Station (ISS) on mission STS-112. Liftoff occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the Space Station. 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. - -- Space Shuttle Atlantis races toward space just after liftoff from Launch Pad 39B on mission STS-112. Liftoff occurred on time at 3:46 p.m. EDT. Along with a crew of six, Atlantis carries the S1 Integrated Truss Structure and the Crew and Equipment Translation Aid (CETA) Cart A to the International Space Station (ISS). 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

ISS018-E-042523 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

KENNEDY SPACE CENTER, FLA. -- STS-112 Mission Specialist David Wolf suits up for launch, just hours away. STS-112 is the 15th assembly flight to the International Space Station, carrying the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss to the Station. Launch is scheduled for 3:46 p.m. EDT from Launch Pad 39B. .

KENNEDY SPACE CENTER, FLA. - A tracking camera on Launch Pad 39B captures the flames of Space Shuttle Atlantis' three main engines as Altantis hurtles into space on mission STS-112. The shoreline of the Atlantic Ocean is visible in the background. Liftoff occurred at 3:46 p.m. EDT. Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

S119-E-007129 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007105 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

KENNEDY SPACE CENTER, FLA. - During suitup for launch, STS-112 Mission Specialist Piers Sellers smiles in anticipation of his first Shuttle flight. STS-112 is the 15th assembly flight to the International Space Station, carrying the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss to the Station. Launch is scheduled for 3:46 p.m. EDT from Launch Pad 39B.

S119-E-007137 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S114-E-6455 (3 August 2005) --- This image features a view of Space Shuttle Discovery docked to the Pressurized Mating Adapter 2 (PMA-2) on the Destiny laboratory of the international space station. The Crew Equipment Translation Aid (CETA) cart and the Mobile Base System (MBS), mounted on the S0 truss, are visible at left. Part of the P1 truss is also visible in the background. Dwarfed by the station and shuttle, Japan Aerospace Exploration Agency (JAXA) astronaut Soichi Noguchi, STS-114 mission specialist, is visible near the PMA-2 during the mission’s third session of extravehicular activity (EVA). The blackness of space and a blue and white Earth form the backdrop for the image.

S119-E-007469 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

ISS018-E-042502 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

ISS018-E-042538 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007134 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007154 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

KENNEDY SPACE CENTER, FLA. -- STS-112 Commander Jeffrey Ashby finishes suiting up for launch. STS-112 is the 15th assembly flight to the International Space Station, carrying the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss to the Station. Launch is scheduled for 3:46 p.m. EDT from Launch Pad 39B.

S119-E-007128 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007165 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

S119-E-007398 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

ISS018-E-042546 (23 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Arnold and Joseph Acaba (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

KENNEDY SPACE CENTER, FLA. - Looking like a star balanced on a stem of smoke, Space Shuttle Atlantis shoots through the clear blue sky after launch on mission STS-112, the 15th assembly flight to the International Space Station. Liftoff from Launch Pad 39B occurred at 3:46 p.m. EDT. Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- STS-112 Pilot Pamela Melroy finishes suiting up for launch. STS-112 is the 15th assembly flight to the International Space Station, carrying the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss to the Station. Launch is scheduled for 3:46 p.m. EDT from Launch Pad 39B. .

S119-E-007123 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

KENNEDY SPACE CENTER, FLA. - STS-112 Mission Specialist Sandra Magnus finishes suiting up before launch. STS-112 is the 15th assembly flight to the International Space Station, carrying the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss to the Station. Launch is scheduled for 3:46 p.m. EDT from Launch Pad 39B.

S119-E-007110 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, participates in the mission's third scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Acaba and Richard Arnold (out of frame), mission specialist, helped robotic arm operators relocate the Crew Equipment Translation Aid (CETA) cart from the Port 1 to Starboard 1 truss segment, installed a new coupler on the CETA cart, lubricated snares on the "B" end of the space station's robotic arm and performed a few "get ahead" tasks.

KENNEDY SPACE CENTER, FLA. -- The view from the External Tank camera shows a cloud of smoke and steam on the pad below as Space Shuttle Atlantis hurtles into space on mission STS-112. The Atlantic Ocean laps the shore on the right. Liftoff from Launch Pad 39B occurred at 3:46 p.m. EDT. Atlantis carries the S1 Integrated Truss Structure 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. On the 11-day mission, three spacewalks are planned to attach the S1 truss.

KENNEDY SPACE CENTER, FLA. -- Orbiter Endeavour begins rolling out of the Orbiter Processing Facility for its rollover to the Vehicle Assembly Building and continued launch preparations. Endeavour is scheduled to launch Nov. 10 on mission STS-113, the 16th assembly flight to the International Space Station. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss and the Crew and Equipment Translation Aid (CETA) Cart B. . Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The CETA Cart B can be used by spacewalkers to move along the truss with equipment The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. -- In the transfer aisle of the Vehicle Assembly Building, overhead cranes are lowered toward orbiter Endeavour for its lift to vertical. Endeavour is scheduled to launch Nov. 10 on mission STS-113, the 16th assembly flight to the International Space Station. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss and the Crew and Equipment Translation Aid (CETA) Cart B. . Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The CETA Cart B can be used by spacewalkers to move along the truss with equipment The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. -- Orbiter Endeavour is ready for rollover to the Vehicle Assembly Building for the next stage of launch preparations. Endeavour is scheduled to launch Nov. 10 on mission STS-113, the 16th assembly flight to the International Space Station. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss and the Crew and Equipment Translation Aid (CETA) Cart B. . Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The CETA Cart B can be used by spacewalkers to move along the truss with equipment The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. - Workers walk alongside orbiter Endeavour as it rolls over to the Vehicle Assembly Building for continued launch preparations. Endeavour is scheduled to launch Nov. 10 on mission STS-113, the 16th assembly flight to the International Space Station. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The CETA Cart B can be used by spacewalkers to move along the truss with equipment The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. - Orbiter Endeavour arrives in the transfer aisle of the Vehicle Assembly Building to continue launch preparations. Endeavour is scheduled to launch Nov. 10 on mission STS-113, the 16th assembly flight to the International Space Station. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss and the Crew and Equipment Translation Aid (CETA) Cart B. . Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The CETA Cart B can be used by spacewalkers to move along the truss with equipment The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. - Atop its transporter, orbiter Endeavour rolls back onto the tow-way for transfer to the Vehicle Assembly Building and continued launch preparations. Endeavour is scheduled to launch Nov. 10 on mission STS-113, the 16th assembly flight to the International Space Station. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The CETA Cart B can be used by spacewalkers to move along the truss with equipment The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. -- A closeup of Endeavour as it rolls over to the Vehicle Assembly Building for continued launch preparations. Endeavour is scheduled to launch Nov. 10 on mission STS-113, the 16th assembly flight to the International Space Station. The primary payloads on mission STS-113 are the first port truss segment, P1 Truss and the Crew and Equipment Translation Aid (CETA) Cart B. . Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. The CETA Cart B can be used by spacewalkers to move along the truss with equipment The mission will also deliver the Expedition 6 crew to the Station and return Expedition 5 to Earth.

KENNEDY SPACE CENTER, FLA. -- Expedition 6 crew member Donald Pettit concentrates on driving an M-113 armored personnel carrier during emergency egress training at the pad. The crew is preparing for the mission aboard Space Shuttle Endeavour, which is scheduled to launch Nov. 10, by taking part in Terminal Countdown Demonstration Test activities. The TCDT includes a simulated launch countdown.. The Expedition 6 crew will travel on Space Shuttle Endeavour to the International Space Station to replace Expedition 5, returning to Earth after 4 months. The primary payloads on mission STS-113 are the first port truss segment, P1, and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. Launch is scheduled for Nov. 10, 2002.

KENNEDY SPACE CENTER, FLA. -- STS-113 Pilot Paul Lockhart test drives an M-113 armored personnel carrier, part of emergency egress training during Terminal Countdown Demonstration Test activities. He is accompanied by several other crew members, seen at left, Mission Specialist Michael Lopez-Alegria and Commander James Wetherbee. The crew is preparing for the mission aboard Space Shuttle Endeavour, which is scheduled to launch Nov. 10. The TCDT includes a simulated launch countdown. The primary payloads on mission STS-113 are the first port truss segment, P1, and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. Also onboard Space Shuttle Endeavour will be the Expedition 6 crew who will replace Expedition 5, returning to Earth after 4 months.