STS-134 crew members Mike Fincke and Greg Chamitoff

JSC2010-E-185506 (12 Nov. 2010) --- NASA astronauts Michael Fincke and Andrew Feustel (partially obscured), both STS-134 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 the crew members in their rehearsal, which intended to help prepare them for work on the exterior of the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration