In the transfer aisle of the Vehicle Assembly Building an overhead crane and sling is ready to lift Atlantis into high bay 3.

In the transfer aisle of the Vehicle Assembly Building, an overhead crane and sling is ready to lift Atlantis 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