At the Cosmonaut Hotel in Baikonur, Kazakhstan, Expedition 48-49 backup crewmember Peggy Whitson of NASA listens to a rendezvous instructor June 30 as her crewmate, Oleg Novitskiy of Roscosmos (right) reviews documents. They are backups to the prime crewmembers, Kate Rubins of NASA, Anatoly Ivanishi

Credit lineAt the Cosmonaut Hotel in Baikonur, Kazakhstan, Expedition 48-49 backup crewmember Peggy Whitson of NASA listens to a rendezvous instructor June 30 as her crewmate, Oleg Novitskiy of Roscosmos (right) reviews documents. They are backups to the prime crewmembers, Kate Rubins of NASA, Anatoly Ivanishin of Roscosmos and Takuya Onishi of the Japan Aerospace Exploration Agency, who will launch July 7, Baikonur time, on the Soyuz MS-01 spacecraft for a planned four-month mission on the International Space Station...NASA/Alexander Vysotsky.. NASA/JSC, 2016-06-30. Public domain. ID: jsc2016e078092.