The crew of STS-135, the final space shuttle mission, trains in the Space Station Training Facility at the Johnson Space Center on Thursday, May 19, 2011, in Houston. ( NASA Photo / Houston Chronicle, Smiley N. Pool ).

JSC2011-E-059424 (19 May 2011) --- The crew of STS-135, the final space shuttle mission, trains in the Space Station Training Facility at NASA?s Johnson Space Center May 19, 2011. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

Photographer Smiley N. Pool

Location Houston, TX, USA

Date May 19, 2011

NASA STS-135 Atlantis exploration final mission launch news shuttle space training

STS_135_ SSTF