Expedition 52 flight engineers Paolo Nespoli of ESA, Sergey Ryazanskiy of Roscosmos and Randy Bresnik of NASA are seen on monitors in a control room as they start their second to last day of qualification exams, Thursday, July 6, 2017 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Beth Weissinger)

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Keywords: astronaut, aviation, beth, city, esa, exploration, flight, human, launch, nasa, pilot, research, rocket, roscosmos, russia, science, scientific, soyuz, space, spaceflight, star, weissinger