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KENNEDY SPACE CENTER, FLA. - In the Space Station Processing Facility, STS-116 crew members check out the port integrated truss structure, P5, which is the primary payload on their mission. Seen here are Mission Specialists Christer Fugelsang, who represents the European Space Agency, and Sunita Williams. The crew is taking part in a Crew Equipment Interface Test that enables them to become familiar with the equipment and payloads they will be using. STS-116 will be mission 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