Expedition 51 backup crewmembers accept commemorative items from a local official in Baikonur Kazakhstan April 7.

Expedition 51 backup crewmembers Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos, center) and Randy Bresnik of NASA (right) accept commemorative items from a local official in Baikonur, Kazakhstan April 7 as part of traditional pre-launch activities. They are serving as backups to Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA, who will launch April 20 on the Soyuz MS-04 spacecraft from the Baikonur Cosmodrome for a four and a half month mission on the International Space Station. NASA/Victor Zelentsov