The families of Expedition 51 Flight Engineer Jack Fischer of NASA and Soyuz Commander Fyodor Yurchikhin of Roscosmos laugh together before watching the traditional door signing ceremony at the Cosmonaut Hotel prior to the Expedition 51 launch, Thursday, April 20, 2017 in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13pm April 20 Baikonur time, and will carry Yurchikhin and Fischer into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

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Keywords: 51, aubrey, baikonur, cosmonaut, door, expedition, gemignani, hotel, kazakhstan, nasa, preflight, roscosmos, signing