KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Mission Specialists Heidemarie Stefanyshyn-Piper (center) and Joseph Tanner (right) look at the orbiter boom sensor system. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Looking at the airlock are Mission Specialist Daniel Burbank (left) and Steven MacLean. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-115 Mission Speciailsts Steven MacLean and Heidemarie Stefanyshyn-Piper (center) review procedures for launch while inspecting the orbiter Atlantis. The crew is at KSC for Crew Equipment Interface Test activities, which involve equipment familiarization and inspection, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-115 Pilot Christopher Ferguson and Commander Brent Jett review procedures in the cockpit of the orbiter Atlantis. The crew is at KSC for Crew Equipment Interface Test activities, which involve equipment familiarization and inspection, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. From left are Mission Specialists Joseph Tanner and Heidemarie Stefanyshyn-Piper. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-115 Commander Brent Jett continues inspection of the orbiter Atlantis with other crew members. The crew is at KSC for Crew Equipment Interface Test activities, which involve equipment familiarization and inspection, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Looking at the airlock are Mission Specialists Steven MacLean (left) and Daniel Burbank (foreground). The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Mission Specialists Heidemarie Stefanyshyn-Piper (second from right) and Joseph Tanner (right) look at the orbiter boom sensor system. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Mission Specialists (starting second from left) Daniel Burbank and Steven MacLean look at the orbiter boom sensor system. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-115 Pilot Christopher Ferguson inspects the window of the cockpit in the orbiter Atlantis. The crew is at KSC for Crew Equipment Interface Test activities, which involve equipment familiarization and inspection, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Mission Specialists (at left) Joseph Tanner and (at right) Heidemarie Stefanyshyn-Piper look at the airlock. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Mission Specialist Daniel Burbank (second from left) looks into the bay. Next to him on the right is Mission Specialist Steven MacLean, talking to a technician. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Mission Specialists Heidemarie Stefanyshyn-Piper (center) and Joseph Tanner look at the orbiter docking mechanism. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. At right are Mission Specialists Heidemarie Stefanyshyn-Piper and Joseph Tanner looking at the orbiter boom sensor system. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-115 Commander Brent Jett completes inspection of the orbiter Atlantis. The crew is at KSC for Crew Equipment Interface Test activities, which involve equipment familiarization and inspection, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-115 Pilot Christopher Ferguson inspects the window of the cockpit in the orbiter Atlantis. The crew is at KSC for Crew Equipment Interface Test activities, which involve equipment familiarization and inspection, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-115 Commander Brent Jett inspects the window of the cockpit in the orbiter Atlantis. The crew is at KSC for Crew Equipment Interface Test activities, which involve equipment familiarization and inspection, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. From left are Mission Specialists Joseph Tanner and Heidemarie Stefanyshyn-Piper. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-115 crew members inspect equipment in Atlantis's payload bay. Looking at the orbiter boom sensor system are, from left, Mission Specialists Joseph Tanner and Heidemarie Stefanyshyn-Piper. The crew is at KSC for Crew Equipment Interface Test activities, which involves equipment familiarization, a routine part of astronaut training and launch preparations. The STS-115 mission will deliver the second port truss segment, the P3/P4 truss, to the International Space Station. The crew will attach the P3 to the first port truss segment, the P1 truss, as well as deploy solar array set 2A and 4A. Launch on Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Kim Shiflett