16-25-23: Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA are greeted by Russian space officials at their launch site in Baikonur, Kazakhstan April 5 after a flight from the Gagarin Cosmonaut Training Center in Star City, Russia for final pre-launch training. Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. NASA/Victor Zelentsov Soyuz MS-04 crew at the airport in Baikonur

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