The shuttle carrier aircraft, or SCA, and its piggyback passenge

Through broken clouds, the shuttle carrier aircraft, or SCA, and its passenger Atlantis ease their way past the Vehicle Assembly Building, at right, for a landing at the KSC Shuttle Landing Facility, known as the SLF. The aircraft is a modified Boeing 747 jetliner. Atlantis landed at Edwards Air Force Base in California to end mission STS-117. The return to KSC began July 1 and took three days after stops across the country for fuel. The last stop was at Ft. Campbell in Kentucky. Weather conditions over the last leg postponed the return trip until July 3. Touchdown was at 8:27 a.m. EDT. Atlantis will be removed from the back of the SCA via the mate/demate device at the SLF. It will then be towed to the Orbiter Processing Facility to begin processing for its next launch, mission STS-122 in December.