STS-133 crew members Tim Kopra and Benjamin Drew

JSC2010-E-046449 (31 March 2010) --- NASA astronaut Tim Kopra, STS-133 mission specialist, attired in a training version of his Extravehicular Mobility Unit (EMU) spacesuit, awaits the start of a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.