Associate Administrator for Space Operations Mission William Gerstenmaier congratulates the launch team after the liftoff of Space Shuttle Atlantis.

Inside the Launch Control Center, Associate Administrator for Space Operations Mission William Gerstenmaier congratulates the launch team after the liftoff of Space Shuttle Atlantis on mission STS-115. Behind him, at right, are Pat Leslie and Robbie Ashley, STS-115 payload manager. Mission STS-115 is the 116th space shuttle flight, the 27th flight for orbiter Atlantis, and the 19th U.S. flight to the International Space Station. Mission STS-115 is scheduled to last 11 days with a planned landing at KSC. Photo credit: NASA/Kim Shiflett