Stock Photo - NASA astronaut Tim Kopra (foreground), Expedition 46 flight engineer and Expedition 47 commander; and European Space Agency astronaut Timothy Peake, Expedition 4647 flight engineer, participate in a routine operations training session in an International Space Station mock-uptrainer in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center.James Blair

Stock Photo: NASA astronaut Tim Kopra (foreground), Expedition 46 flight engineer and Expedition 47 commander; and European Space Agency astronaut Timothy Peake.

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