Members of the 103rd Pararescue Squadron practice removing the helmet of an astronaut flight suit during a Pararescue briefing in the build up to the final planned launch of the space shuttle, ... more 
Members of the 103rd Pararescue Squadron practice removing the helmet of an astronaut flight suit during a Pararescue 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 2:55 PM EDT