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At the Cosmonaut Hotel crew quarters in Baikonur, Kazakhstan, backup Expedition 61 crewmember Tom Marshburn of NASA takes a spin in a rotating chair Sept. 18 to test his vestibular system as part of pre-launch activities. He is one of the backups to the prime crew, spaceflight participant Hazzaa ali Almansoori of the United Arab Emirates and Expedition 61 crewmembers Oleg Skripochka of Roscosmos and Jessica Meir of NASA, who are set to launch Sept. 25 from the Baikonur Cosmodrome in Kazakhstan on the Soyuz MS-15 spacecraft for a mission on the International Space Station.