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At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 49-50 prime crewmembers Shane Kimbrough of NASA (left) and Andrey Borisenko (center) and Sergey Ryzhikov (right) of Roscosmos wave to reporters Aug. 30 at the start of two days of final qualification exams. The trio is preparing for launch on Sept. 24 (Kazakh time) on their Soyuz MS-02 vehicle from the Baikonur Cosmodrome in Kazakhstan for a five-month mission on the International Space Station.