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KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, workers keep watch as the P5 truss for mission STS-116 moves toward the payload canister (background left). The truss will be transported to Launch Pad 39B where it will wait for installation in Space Shuttle Discovery’s payload bay. The third port truss segment, the P5 will be attached to the P3/P4 truss on the International Space Station during the 11-day mission. The window for launch of mission STS-116 opens Dec. 7. Photo credit: NASA/George Shelton