Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency Roscosmos.

At the Cosmonaut Hotel crew quarters in Baikonur, Kazakhstan, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, center) and Jack Fischer of NASA (right) practice rendezvous techniques on a laptop simulator April 13 in preparation for their launch. Yurchikhin and Fischer will liftoff April 20 from the Baikonur Cosmodrome on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. NASA/Victor Zelentsov