KENNEDY SPACE CENTER, FLA. -- Members of the STS-112 crew look over the S1 ITS, primary payload on their mission, as part of the Crew Equipment Interface Test. Seen at left are Mission Specialist Sandra Magnus, Pilot Pamela Melroy; below at right is Mission Specialist Piers Sellers. Mission STS-112 will be ferrying the S1 truss to the International Space Station on its scheduled Aug. 22 flight. The S1 truss is the first starboard (right-side) truss segment, whose main job is providing structural support for the orbiting research facility's radiator panels that cool the Space Station's complex power system. The S1 truss segment also will house communications systems, external experiment positions and other subsystems. The S1 truss will be attached to the S0 truss KSC-02pd0987