The astronauts of space shuttle Atlantis, clockwise from left, commander Chris Ferguson, mission specialist Rex Walhiem, mission specialist Sandy Magnus and pilot Doug Hurley, attend a briefing during... more 
The astronauts of space shuttle Atlantis, clockwise from left, commander Chris Ferguson, mission specialist Rex Walhiem, mission specialist Sandy Magnus and pilot Doug Hurley, attend a briefing during emergency safety training in the Terminal Countdown Demonstration Test at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 22, 2011. The launch of Atlantis, the final space shuttle mission, is scheduled for July 8. (AP Photo/John Raoux, Pool) less 
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Associated Press | Photo By John Raoux, Pool
Wed, Jun 22, 2011 1:13 PM EDT