Space shuttle Atlantis lands at the Kennedy Space Center in Cape Canaveral, Fla., Thursday, July 21, 2011. The landing of Atlantis brings the space shuttle program to an end. (AP Photo/John Raoux)

Associated Press
Space shuttle Atlantis lands at the Kennedy Space Center in Cape Canaveral, Fla., Thursday, July 21, 2011.  The landing of Atlantis brings the space shuttle program to an end. (AP Photo/John Raoux)
Space shuttle Atlantis lands at the Kennedy Space Center in Cape Canaveral, Fla., Thursday, July 21, 2011. The landing of Atlantis brings the space shuttle program to an end. (AP Photo/John Raoux)
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