Expedition crewmembers Fyodor Yurchikhin pose for pictures after planting a tree as part of traditional pre-launch activities.

At the Cosmonaut Hotel crew quarters in Baikonur, Kazakhstan, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) pose for pictures after planting a tree in Fischer’s name April 13 as part of traditional pre-launch activities. Fischer and Yurchikhin 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