A technician points out elements of the S3 S4 Integrated Truss Segment during Crew Equipment Interface Test CEIT activities.

In the Space Station Processing Facility, a technician points out elements of the S3/S4 Integrated Truss Segment to STS-117 Mission Specialist James Reilly (right) during Crew Equipment Interface Test (CEIT) activities. A CEIT provides the astronauts opportunities to become familiar with equipment and hardware with which they will be working during their mission. The crew of mission STS-117 will deliver and install the second and third starboard truss segments (S3/S4) and another pair of solar arrays and batteries during the Space Shuttle Program's 21st mission to the International Space Station. Launch of Space Shuttle Atlantis is scheduled for March 2007. Photo credit: NASA/Kim Shiflett