Prime crew member Sergey Prokopyev of Roscosmos signs in for the first of two days of final Soyuz qualification exams.

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 56 prime crew member Sergey Prokopyev of Roscosmos signs in for the first of two days of final Soyuz qualification exams May 10. Prokopyev, Serena Aunon-Chancellor of NASA and Alexander Gerst of the European Space Agency will launch June 6 from the Baikonur Cosmodrome in Kazakhstan on the Soyuz MS-09 spacecraft for a six-month mission on the International Space Station...NASA/Elizabeth Weissinger.