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September 4, 2012
JSC2011-E-005861 (19 Jan. 2011) --- NASA astronauts Mike Fossum (left), Expedition 28 flight engineer and Expedition 29 commander; Rex Walheim and Sandy Magnus, both STS-135 mission specialists, participate in a joint emergency scenarios 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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