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September 6, 2012
JSC2010-E-183251 (4 Nov. 2010) --- NASA astronaut Rex Walheim, STS-135 mission specialist, attired in a training version of his shuttle launch and entry suit, awaits the start of a training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

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