Members of various USAF Pararescue Squadrons study their mission briefing in the build up to the final planned launch of the space shuttle, STS-135, Thursday, July 7, 2011, at Patrick Air Force Base, ... more 
Members of various USAF Pararescue Squadrons study their mission briefing in the build up to the final planned launch of the space shuttle, STS-135, Thursday, July 7, 2011, at Patrick Air Force Base, Fla. This final launch of the Space Shuttle Atlantis marks the end of the program's 30-year history. (AP Photo/John Minchillo) less 
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Associated Press | Photo By John Minchillo
Thu, Jul 7, 2011 2:56 PM EDT