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At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 backup crewmembers Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos, left) and Randy Bresnik of NASA (right) report to State Commission officials March 30 for the start of two days of final crew qualification exams. They are backups to Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA, who will launch April 20 on the Soyuz MS-04 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a four and a half month mission on the International Space Station.