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KENNEDY SPACE CENTER, FLA. -- STS-116 crew members are heading into the Astrovan that will take them to Launch Pad 39B and the simulated countdown. From left are Pilot William Oefelein (on the steps) and Mission Specialists Christer Fuglesang, Sunita Williams and Robert Curbeam. Already inside are Commander Mark Polansky and Mission Specialists Joan Higginbotham and Nicholas Patrick. The crew is practicing for launch with a simulation of activities, from crew breakfast and suit-up to countdown in the orbiter. The STS-116 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. Launch is scheduled for no earlier than Dec. 7. Photo credit: NASA/Kim Shiflett