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KENNEDY SPACE CENTER, FLA. - In the transfer aisle of the Vehicle Assembly Building, an overhead crane and sling raise Atlantis off its transporter in preparation for lifting it to a vertical position. Atlantis then will be lifted into high bay 3 for stacking with the external tank and solid rocket boosters already installed on the mobile launcher platform. After mating with the external tank and boosters, Atlantis will undergo a shuttle interface test and other prelaunch processing. Atlantis' launch window begins Aug. 28. During its 11-day mission to the International Space Station, the STS-115 crew of six astronauts will continue construction of the station and install their cargo, the Port 3/4 truss segment with its two large solar arrays. Photo credit: NASA/Kim Shiflett