STS-135 water survival training at the NBL

JSC2011-E-016240 (9 Feb. 2011) --- Attired in training versions of their shuttle launch and entry suits, STS-135 crew members are pictured during a water survival training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Pictured from the left are NASA astronauts Sandy Magnus, mission specialist; Chris Ferguson, commander; Rex Walheim, mission specialist; and Doug Hurley, pilot. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration