In the Space Station Processing Facility, an overhead crane lowers the S3/S4 integrated truss structure onto a work stand. It was moved from a rotation stand at left. Along with a third set of solar arrays and batteries, the truss is scheduled to fly on mission STS-117 aboard Space Shuttle Atlantis to the International Space Station. The crew of six astronauts will install the truss to continue assembly of the station. Photo credit: NASA/Dimitri Gerondidakis