In the Orbiter Processing Facility bay 1 at NASA Kennedy Space Center, engineers stand by as the remote manipulator system, or boom, is lowered toward Atlantis’ payload bay for installation. Atlantis is the designated orbiter for mission STS-115, the 19th assembly flight to the International Space Station. The payload includes the P3/P4 solar arrays. The launch planning window has not been determined yet for STS-115.