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KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, STS-116 Pilot William Oefelein checks the cockpit window of Discovery as part of a Crew Equipment Interface Test (CEIT). A CEIT allows astronauts to become familiar with equipment and hardware they will use on the mission. 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