Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Scott... more 
Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Scott M. Lieberman) less 
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Associated Press | Photo By Scott M. Lieberman
Thu, Jul 21, 2011 5:10 PM EDT