Stock Photo - European Space Agency astronaut Alexander Gerst (foreground) and NASA astronaut Reid Wiseman (center), both Expedition 4041 flight engineers; along with NASA astronaut Steve Swanson, Expedition 39 flight engineer and Expedition 40 commander, participate in a Depress Crew Response training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Using a specific type of pressure sensor, this contingency training prepares the crew in the procedures to follow in the event of an emergency depressurization of the space station and evacuation in a Soyuz spacecraft.

Stock Photo: European Space Agency astronaut Alexander Gerst (foreground) and NASA astronaut Reid Wiseman (center), both Expedition 4041 flight engineers; along with NASA.

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