Expedition 53 crew members, Joe Acaba of NASA, left, Mark Vande Hei of NASA, center, and Alexander Misurkin of Roscosmos wave farewell as they depart the Gagarin Cosmonaut Training Center, Wednesday, Sept. 6, 2017 in Star City, Russia. The crew is flying to Baikonur, Kazakhstan in preparation for their launch Sept. 13 on the Soyuz MS-06 spacecraft for a five and a half month mission on the International Space Station. Photo Credit: (NASA/Bill Ingalls)

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