The STS-135 mission specialist Rex Walheim, right, videotapes fellow crew members Chris Ferguson, commander; Doug Hurley, pilot; and Sandy Magnus, mission specialist before boarding space shuttle Atlantis at launch pad 39A prior to launch, Friday, July 8, 2011 at the NASA Kennedy Space Center in Cape Canaveral, Fla. The launch of Atlantis, STS-135, is the final flight of the shuttle program, a 12-day mission to the International Space Station.