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KENNEDY SPACE CENTER, FLA. -- In Orbiter Processing Facility bay 2 at NASA's Kennedy Space Center, technicians direct the placement of the crew airlock module into Endeavour's payload bay, where it will be installed. The airlock is located in the middeck. The airlock and airlock hatches permit flight crew members to transfer from the middeck crew compartment into the payload bay for extravehicular activities in their space suits without depressurizing the orbiter crew cabin. The airlock is sized to accommodate two fully suited flight crew members simultaneously. Endeavour is targeted for flight on Aug. 9 on mission STS-118 to the International Space Station. Photo credit: NASA/Jack Pfaller