Expedition 52 backup crew member Alexander Misurkin of Roscosmos reviews his paperwork as he and Expedition 52 backup crew member Mark Vande Hei of NASA, background, and Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA) start their Soyuz qualification exams, Thursday, July 6, 2017 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

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Keywords: alexander, astronaut, aviation, bill, city, esa, exploration, flight, hei, human, ingalls, launch, mark, misurkin, nasa, pilot, research, rocket, roscosmos, russia, science, scientific, soyuz, space, spaceflight, star, vande