In the Integration Building at the Baikonur Cosmodrome in Kazakhstan, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian space agency Roscosmos and Jack Fischer of NASA sit for pictures April 6, 2017, in front of their Soyuz MS-04 spacecraft as part of pre-launch preparations. Credits: NASA

In the Integration Building at the Baikonur Cosmodrome in Kazakhstan, Expedition 51 crew members Fyodor Yurchikhin of the Russian space agency Roscosmos and Jack Fischer of NASA sit for pictures April 6, 2017, in front of their Soyuz MS-04 spacecraft as part of pre-launch preparations. Credits: NASA

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