STS-127 astronauts Chris Cassidy and Tom Marshburn

JSC2008-E-124047 (20 Oct. 2008) --- Astronaut Tom Marshburn, STS-127 mission specialist, attired in a training version of his Extravehicular Mobility Unit (EMU) spacesuit, awaits the start of a training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.