STS-135 Atlantis Landing

NASA Chief of the Astronaut Office Peggy Whitson, right, walks with STS-135 Commander Chris Ferguson as he prepares to board the astrovan at the NASA's Kennedy Space Center Shuttle Landing Facility (SLF) shortly after he and the rest of the STS-135 crew landed in space shuttle Atlantis, completing a 13-day mission to the International Space Station (ISS) and the final flight of the Space Shuttle Program, 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)