Copyright 2011, The Associated Press
In this image provided by NASA, Space Shuttle Atlantis touches down at NASA's Kennedy Space Center Shuttle Landing Facility in Cape Canaveral, Fla., completing its 13-day mission to the International Space Station and the final flight of the Space Shuttle Program, early Thursday morning, July 21, 2011. Atlantis, the fourth orbiter built, launched on its first mission on Oct. 3, 1985. (AP Photo/NASA - Bill Ingalls)
