Final space shuttle crew training session in the NBL

Photograph final space shuttle crew training session in the NBL with STS-135 Mission Specialists Sandy Magnus & Rex Walheim. STS-135 Commander Chris Ferguson serves as Intravehicular suit-up lead, Pilot Doug Hurley serves as robotic arm operator. Mission Specialists Sandy Magnus & Rex Walheim in the water. Photo Date: June 13, 2011. Location: NBL - Pool Topside. Photographer: Robert Markowitz

JSC2011-E-054076 (13 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim (mostly obscured), both STS-135 mission specialists, attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuits, are about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Divers are in the water to assist Magnus and Walheim in their rehearsal. Photo credit: NASA

Photographer ROBERT MARKOWITZ