AirshowExpedition 56 backup crewmember David Saint-Jacques of the Canadian Space Agency poses for pictures in the Kremlin gardens in Moscow May 14.

AirshowExpedition 56 backup crewmember David Saint-Jacques of the Canadian Space Agency poses for pictures in the Kremlin gardens in Moscow May 14 as part of traditional pre-launch activities. Saint-Jacques is serving as a backup to the prime crew, Serena Aunon-Chancellor of NASA, Sergey Prokopyev of Roscosmos and Alexander Gerst of the European Space Agency, who 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.