STS-127 astronauts Dave Wolf and Tim Kopra during STS-127 2J/A EVA training at the NBL

JSC2008-E-122401 (9 Oct. 2008) --- Attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuits, astronauts Tim Kopra and Dave Wolf (out of frame), STS-127 mission specialists, are submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. 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 exterior of the International Space Station. Kopra is scheduled to join Expedition 19 as flight engineer after launching to the International Space Station with the STS-127 crew.