At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 56 prime crew member Serena Aunon-Chancellor of NASA signs in for the first of two days of final Soyuz qualification exams May 10. Aunon-Chancellor, Sergey Prokopyev of Roscosmos (back, left) and Alexander Gerst of the European Space Agency (back, right) 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.