JSC2010-E-170899 (1 Oct. 2010) --- United Space Alliance crew trainer Robert (Rob) Tomaro (right) briefs STS-135 crew members during a training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Seated from the left are NASA astronauts Rex Walheim, mission specialist; Doug Hurley, pilot; Chris Ferguson, commander; and Sandy Magnus, mission specialist. STS-135 is planned to be the final mission of the space shuttle program.

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