AirshowAt the Gagarin Cosmonaut Training Center in Star City Russia Expedition 56 crewmember Sergey Prokopyev of Roscosmos signs.

AirshowAt the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 56 crewmember Sergey Prokopyev of Roscosmos signs in for the final day of Soyuz qualification exams May 11. Looking on is his crewmate, NASA’s Serena Aunon-Chancellor. Prokopyev, Aunon-Chancellor and Alexander Gerst of the European Space Agency will launch June 6 on the Soyuz MS-09 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a six-month mission on the International Space Station...NASA/Elizabeth Weissinger.