Expedition 47 backup crew member, Russian cosmonaut Sergei Ryzhikov of Roscosmos signs documents ahead of his Soyuz qualification exams with Russian cosmonaut Andre Borisenko of Roscosmos, and NASA astronaut Shane Kimbrough , Wednesday, Feb. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia.

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Keywords: 47, center, city, cosmonaut, expedition, gagarin, nasa, preflight, roscosmos, rus, russia, ryzhikov, sergei, star, training