Stock Photo - European Space Agency astronaut Alexander Gerst, Expedition 4041 flight engineer, participates 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. Crew instructor Jessica Newman assists Gerst.

Stock Photo: European Space Agency astronaut Alexander Gerst, Expedition 4041 flight engineer, participates in an electrical power system training session in the Space.

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