KSC-2011-5208

CAPE CANAVERAL, Fla. -- A NASA helicopter circles space shuttle Atlantis on Launch Pad 39A prior to launch on the STS-135 mission. To the right of the shuttle, the fixed service structure which is normally closed around the shuttle now is open for liftoff. At left of the pad is the 300,000-gallon water tower that provides the water used for sound suppression on the pad during liftoff. Atlantis and its crew of four -- Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandy Magnus and Rex Walheim -- are scheduled to lift off at 11:26 a.m. EDT on July 8 to deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Frank Michaux