Stock Photo - NASA astronaut Steve Swanson, Expedition 39 flight engineer and Expedition 40 commander, speaks in a microphone during an emergency scenario training session in an International Space Station mock-uptrainer in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center.

Stock Photo: NASA astronaut Steve Swanson, Expedition 39 flight engineer and Expedition 40 commander, speaks in a microphone during an emergency scenario training session in.

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