Stock Photo - Expedition 49 backup crew members Mark Vande Hei of NASA, left, Alexander Misurkin, center, and Nikolai Tikhonov of Roscosmos, left, exit the Gagarin Cosmonaut Training Center (GCTC) aircraft after arriving in Baikonur, Kazakhstan on Friday, Oct. 7, 2016. The trio are preparing for launch to the International Space Station in their Soyuz MS-02 spacecraft from the Baikonur Cosmodrome in Kazakhstan on October 19, 2016. Photo Credit: (NASAVictor Zelentsov)

Stock Photo: Expedition 49 backup crew members Mark Vande Hei of NASA, left, Alexander Misurkin, center, and Nikolai Tikhonov of Roscosmos, left.

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