NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Editorial use only.
Final shuttle mission astronaut training. NASA astronaut Rex Walheim (STS-135 mission specialist) being lowered into the Neutral Buoyancy Laboratory (NBL) in a training version of his Extravehicular Mobility Unit (EMU) spacesuit in preparation for a spacewalk training session. Photographed at NASA's Johnson Space Center, Houston, USA, on 22nd March 2011.
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