Stock Photo - European Space Agency astronaut Timothy Peake (left), Expedition 4647 flight engineer; and NASA astronaut Tim Kopra (right), Expedition 46 flight engineer and Expedition 47 commander, prepare for a training session in the Cupola trainer in the systems engineering simulator in the Avionics Systems Laboratory at NASA's Johnson Space Center. Instructor Alan C. Fox assists Peake and Kopra.

Stock Photo: European Space Agency astronaut Timothy Peake (left), Expedition 4647 flight engineer; and NASA astronaut Tim Kopra (right).

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