Stock Photo - NASA astronaut Steve Swanson (background), Expedition 39 flight engineer and Expedition 40 commander; along with NASA astronaut Reid Wiseman (foreground) and European Space Agency astronaut Alexander Gerst, both Expedition 4041 flight engineers, participate in an electrical power system training session in the Space Station Training Facility in the Jake Garn Simulation and Training Facility at NASA's Johnson Space Center.

Stock Photo: NASA astronaut Steve Swanson (background), Expedition 39 flight engineer and Expedition 40 commander; along with NASA astronaut Reid Wiseman (foreground) and.

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