Astronauts Michael Good (left) and John Grunsfeld, both STS-125 mission specialists, participate in a spacewalk training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.
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Astronauts Michael Good (left) and John Grunsfeld, both STS-125 mission specialists, participate in a spacewalk training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.