Expedition 51 back up crew member, Soyuz Commander Sergey Ryazanskiy of Roscosmos, left, answers a question during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Wednesday, April 19, 2017. He is seen with Expedition 51 back up crew mate Randy Bresnik of NASA. The Expedition 51 prime crew is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

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Keywords: 51, aubrey, baikonur, bresnik, conference, cosmonaut, expedition, gemignani, hotel, kazakhstan, nasa, press, randy, roscosmos, ryazanskiy, sergey