Expedition 54 backup crew members Jeanette Epps of NASA, left, Sergey Prokopev of Roscosmos, center, and Alex Gerst of ESA (European Space Agency), right, pose for a picture as the Soyuz rocket is rolled out to the pad, Friday, Dec. 15, 2017 at the Baikonur Cosmodrome in Kazakhstan. Expedition 54 Soyuz Commander Anton Shkaplerov of Roscosmos, flight engineer Scott Tingle of NASA, and flight engineer Norishige Kanai of Japan Aerospace Exploration Agency (JAXA) are scheduled to launch at 2:21 Eastern Time (1:21 Baikonur time) on Dec. 17 and will spend the next five months living and wo

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Expedition 54 backup crew members Jeanette Epps of NASA, left, Sergey Prokopev of Roscosmos, center, and Alex Gerst of ESA (European Space Agency), right, pose for a picture as the Soyuz rocket is rolled out to the pad, Friday, Dec. 15, 2017 at the Baikonur Cosmodrome in Kazakhstan. Expedition 54 Soyuz Commander Anton Shkaplerov of Roscosmos, flight engineer Scott Tingle of NASA, and flight engineer Norishige Kanai of Japan Aerospace Exploration Agency (JAXA) are scheduled to launch at 2:21 Eastern Time (1:21 Baikonur time) on Dec. 17 and will spend the next five months living and working aboard the International Space Station. Photo Credit: (NASA/Joel Kowsky)

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