STS 125 crew training. Astronauts Massimino and Good

JSC2008-E-118378 (25 Sept. 2008) --- Astronauts Mike Massimino and Michael Good (partially obscured), both STS-125 mission specialists, are about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Massimino and Good are attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuit. SCUBA-equipped divers (out of frame) are in the water to assist the crewmembers in their rehearsal, intended to help prepare them for work on the Hubble Space Telescope.