jsc2017e040342 (April 7, 2017) --- 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 jsc2017e040342