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KENNEDY SPACE CENTER, FLA. -- The crawler-transporter moves away from Launch Pad 39B after depositing its cargo, Space Shuttle Discovery and the mobile launcher platform. The shuttle's external tank is capped by the oxygen vent hood. Farther to the left above the fixed service structure is the 80-foot tall lightning mast. The rollout from the Vehicle Assembly Building began at 12:29 a.m. The shuttle was harddown on the pad at 9:03 a.m. The mission is No. 20 to the International Space Station and construction flight 12A.1. The mission payload is the SPACEHAB module, the P5 integrated truss structure and other key components. The launch window for mission STS-116 opens Dec. 7. Photo credit: NASA/Jim Grossmann