Photo de stock - At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 3738 Flight Engineer Sergey Ryazanskiy (right, front row) signs a certification book in a traditional ceremony Sept. 6 as his prime and backup crewmates look on. In the front row are prime crewmates NASA Flight Engineer Michael Hopkins (left) and Soyuz Commander Oleg Kotov (center). In the back row are backup crewmembers Steve Swanson of NASA (left), Alexander Skvortsov (center) and Oleg Artemyev. Hopkins, Kotov and Ryazanskiy are preparing for their launch to the International Space Station from the Baikonur Cosmodrome in Kazakhstan on Sept. 26, Kazakh time, aboard the Soyuz TMA-10M spacecraft.

Photo de stock: At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 3738 Flight Engineer Sergey Ryazanskiy (right, front row) signs a certification book.

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