NASA Launch Director Michael Leinbach, right, hands an American flag to a worker on the runway of the Shuttle Landing Facility (SLF) shortly after the space shuttle Atlantis (STS-135) landed early Thursday morning, July 21, 2011, in Cape Canaveral, Fla. Overall, Atlantis spent 307 days in space and traveled nearly 126 million miles during its 33 flights. Atlantis, the fourth orbiter built, launched on its first mission on Oct. 3, 1985. Photo Credit: (NASA/Bill Ingalls)