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KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, the crew members of mission STS-117 are suiting up for a launch attempt at 7:38 p.m. EDT from Launch Pad 39A aboard Space Shuttle Atlantis. Pictured here is Mission Specialist Steven Swanson, who is making his first shuttle flight. The shuttle is delivering a new segment to the starboard side of the International Space Station's backbone, known as the truss. Three spacewalks are planned to install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. STS-117 is the 118th space shuttle flight, the 21st flight to the station, the 28th flight for Atlantis and the first of four flights planned for 2007. Photo credit: NASA/Kim Shiflett