WIKIARCHIVES.SPACE

Expedition 51 backup crewmembers Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos, left) and Randy Bresnik of NASA (right) arrive at their launch site in Baikonur, Kazakhstan April 5 for final pre-launch training after a flight from the Gagarin Cosmonaut Training Center in Star City, Russia. They are serving as backups to Jack Fischer of NASA and Fyodor Yurchikhin of Roscosmos who will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station.