Stock Photo - NASA astronaut Tim Kopra, Expedition 46 flight engineer and Expedition 47 commander, gets help donning a training version of his Extravehicular Mobility Unit (EMU) spacesuit in preparation for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.Robert Markowitz

Stock Photo: NASA astronaut Tim Kopra, Expedition 46 flight engineer and Expedition 47 commander, gets help donning a training version of his Extravehicular Mobility Unit.

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