The Expedition 51 backup crew, Soyuz Commander Sergey Ryazanskiy of Roscosmos, left, and Flight Engineer Randy Bresnik of NASA, right, are photographed in front of the Soyuz MS-04 spacecraft as it arrives at the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will send Expedition 51 prime crew, Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA on a four and a half month mission aboard the International Space Station. Photo Credit: (NASA/Aubrey Ge

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The Expedition 51 backup crew, Soyuz Commander Sergey Ryazanskiy of Roscosmos, left, and Flight Engineer Randy Bresnik of NASA, right, are photographed in front of the Soyuz MS-04 spacecraft as it arrives at the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will send Expedition 51 prime crew, Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA on a four and a half month mission aboard the International Space Station. Photo Credit: (NASA/Aubrey Gemignani) Expedition 51 Rollout (NHQ201704170029)

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Photo credit: © NASA Image Collection / Alamy / Afripics
License: Licensed
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