Stock Photo - At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 4445 backup Flight Engineer Timothy Kopra of NASA signs in for the first of two days of qualification exams May 6 as his crewmates, Yuri Malenchenko of the Russian Federal Space Agency (Roscosmos, center) and Timothy Peake of the European Space Agency (left) look on. They are the backups to the prime crew

Stock Photo: At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 4445 backup Flight Engineer Timothy Kopra of NASA signs in for the first of two days.

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