File:US Navy 090324-N-2959L-189 Lt. Cmdr. Chris Cassidy smiles after donning his space suit during zero gravity training at the Neutral Buoyancy Lab (NLB).jpg
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- 39-year-old human males
- Astronauts in 2009
- Christopher Cassidy
- Training versions of the Extravehicular Mobility Unit
- Male humans with headsets
- March 2009 in Texas
- Men at work in Texas
- Men at work in the 2000s
- Men facing right and looking left
- Men smiling with teeth
- Military people of the United States in 2009
- Neutral Buoyancy Laboratory
- Pictures by Mass Communication Specialists
- Smiling men in the United States
- 2009 in Houston
- STS-127 training