Expedition 56 Flight Engineer Ricky Arnold of NASA restss in a helicopter as Russian Nurse Artiom Kharchikov, left, and NASA Flight Surgeon Steven Piper, right look after him near the town of Zhezkazgan, Kazakhstan on Thursday, Oct. 4, 2018. Arnold, Expedition 56 Commander Drew Feustel of NASA and Expedition 56 Flight Engineer and Soyuz Commander Oleg Artemyev of Roscosmos returned to Earth after 197 days in space where they served as members of the Expedition 55 and 56 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Japan Aerospace Exploration Agency (JAXA) astronaut Norishige Kanai departs the medical tent shortly after he and fellow Expedition 55 crew members, Roscosmos cosmonaut Anton Shkaplerov, and NASA astronaut Scott Tingle landed in their Soyuz MS-07 spacecraft near the town of Zhezkazgan, Kazakhstan on Sunday, June 3, 2018. Shkaplerov, Tingle, and Kanai are returning after 168 days in space where they served as members of the Expedition 54 and 55 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 56 Flight Engineer Ricky Arnold of NASA signs photos inside a helicopter after being flown form the Soyuz MS-08 landing zone to the Karaganda Airport in Kazakhstan Thursday, Oct. 4, 2018. Arnold, Expedition 56 Commander Drew Feustel of NASA and Expedition 56 Flight Engineer and Soyuz Commander Oleg Artemyev of Roscosmos returned to Earth after 197 days in space where they served as members of the Expedition 55 and 56 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 47 astronaut Tim Kopra of NASA, center, arrives at the Karaganda Airport in Kazakhstan a few hours after he, Yuri Malenchenko of Roscosmos, and Tim Peake of the European Space Agency landed in their Soyuz TMA-19M spacecraft near the town of Zhezkazgan, Kazakhstan on Saturday, June 18, 2016. Kopra, Peake, and Malenchenko are returning after six months in space where they served as members of the Expedition 46 and 47 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)