Expedition 49 backup crew members Mark Vande Hei of NASA, left, Alexander Misurkin, center, and Nikolai Tikhonov of Roscomos, left, report to Russian space officials after arriving in Baikonur, Kazakhstan on Friday, Oct. 7, 2016. The trio are preparing for launch to the International Spacestation in their Soyuz MS-02 spacecraft from the Baikonur Cosmodrome in Kazakhstan on October 19, 2016. Photo Credit: (NASA/Victor Zelentsov)

Expedition 49 backup crew members Mark Vande Hei of NASA, left, Alexander Misurkin, center, and Nikolai Tikhonov of Roscomos, left, exit the Gagarin Cosmonaut Training Center (GCTC) aircraft after arriving in Baikonur, Kazakhstan on Friday, Oct. 7, 2016. The trio are preparing for launch to the International Spacestation in their Soyuz MS-02 spacecraft from the Baikonur Cosmodrome in Kazakhstan on October 19, 2016. Photo Credit: (NASA/Victor Zelentsov)

Expedition 49 prime crew members Shane Kimbrough of NASA, left, Sergey Ryzhikov of Roscosmos, second from left, and Andrey Borisenko of Roscosmos, third from left, pose with Expedition 49 backup crew members Nikolai Tikhonov of Roscosmos, third from right, Alexander Misurkin of Roscosmos, second from right, and Mark Vande Hei of NASA, right, pose for a picture outside of the Baikonur Cosmodrome Museum, Thursday, Oct. 13, 2016 at the Baikonur Cosmodrome in Kazakhstan. Kimbrough, Ryzhikov, and Borisenko are scheduled to launch from the Baikonur Cosmodrome in Kazakhstan on Oct. 19. Photo Credit: (NASA/Victor Zelentsov)

Expedition 49 backup crew members Mark Vande Hei of NASA, left, Alexander Misurkin Soyuz, center, and Nikolai Tikhonov of Roscosmos, right, pose for a picture in front of the Soyuz MS-02 spacecraft during the final fit check of the spacecraft on Thursday, Oct. 13, 2016 at the Baikonur Cosmodrome in Kazakhstan. Expedition 49 flight engineer Shane Kimbrough of NASA, flight engineer Andrey Borisenko of Roscosmos, and Soyuz commander Sergey Ryzhikov of Roscosmos are scheduled to launch from the Baikonur Cosmodrome in Kazakhstan on Oct. 19. Photo Credit: (NASA/Victor Zelentsov)

Expedition 49 prime crew members, seated in their Sokol suits, Shane Kimbrough of NASA, left, Soyuz commander Sergey Ryzhikov, center, and flight engineer Andrey Borisenko of Roscosmos, right, and backup crew members, standing, Mark Vande Hei of NASA, left, Alexander Misurkin, center, and Nikolai Tikhonov of Roscosmos, left, pose for a picture as they prepare to conduct their first check dress rehearsal activities, Saturday, Oct. 8, 2016 at the Baikonur Cosmodrome in Kazakhstan. Kimbrough, Ryzhikov, and Borsenko will launch from the Baikonur Cosmodrome in Kazakhstan on Oct. 19. Photo Credit: (NASA/Victor Zelentsov)

Expedition 49 flight engineer Shane Kimbrough of NASA, left, Soyuz commander Sergey Ryzhikov of Roscosmos, second from left, and flight engineer Andrey Borisenko of Roscosmos third from left, pose for a picture with backup crew members Mark Vande Hei of NASA, third from right, Alexander Misurkin of Roscosmos, second from right, and Nikolai Tikhonov of Roscosmos, right, infront of at the Cosmonaut Hotel on Friday, Sept. 16, 2016 in Baikonur, Kazakhstan. Kimbrough, Ryzhikov, and Borisenko are scheduled to launch to the International Space Station aboard the Soyuz MS-02 spacecraft from the Baikonur Cosmodrome on September 24 Kazakh time. Photo Credit: (NASA/Victor Zelentsov)

Expedition 49 backup crew members Mark Vande Hei of NASA, left, Alexander Misurkin of Roscosmos, second from left, and Nikolai Tikhonov of Roscosmos, third from left, pose for pictures with Expedition 49 prime crew members Shane Kimbrough of NASA, third from right, Sergey Ryzhikov of Roscosmos, second from right, and Andrey Borisenko of Roscosmos, right, in front of the base of a Soyuz rocket on Thursday, Oct. 13, 2016 at the Baikonur Cosmodrome in Kazakhstan. Expedition 49 flight engineer Shane Kimbrough of NASA, flight engineer Andrey Borisenko of Roscosmos, and Soyuz commander Sergey Ryzhikov of Roscosmos are scheduled to launch from the Baikonur Cosmodrome in Kazakhstan on Oct. 19. Photo Credit: (NASA/Victor Zelentsov)

Expedition 49 flight engineer Shane Kimbrough of NASA, left, Soyuz commander Sergey Ryzhikov of Roscosmos, second from left, and flight engineer Andrey Borisenko of Roscosmos third from left, pose for a picture with backup crew members Mark Vande Hei of NASA, third from right, Alexander Misurkin of Roscosmos, second from right, and Nikolai Tikhonov of Roscosmos, right, after taking part in the traditional tree planing ceremony at the Cosmonaut Hotel on Friday, Sept. 16, 2016 in Baikonur, Kazakhstan. Kimbrough, Ryzhikov, and Borisenko are scheduled to launch to the International Space Station aboard the Soyuz MS-02 spacecraft from the Baikonur Cosmodrome on September 24 Kazakh time. Photo Credit: (NASA/Victor Zelentsov)

Commercial Crew Program astronaut Barry "Butch" Wilmore in EVA suitup at NBL with Expedition 62 cosmonaut Nikolai Tikhonov during Expedition 62 ISS EVA Maintenance 2 training.

Wearing native garb, Expedition 49 backup crewmembers Mark Vande Hei of NASA and Alexander Misurkin and Nikolai Tikhonov of Roscosmos enjoy a cup a tea in a traditional Kazakh setting at a local museum Sept. 10 while on a tour of the city of Baikonur, Kazakhstan. They are serving as backups to Shane Kimbrough of NASA and Sergey Ryzhikov and Andrey Borisenko of Roscosmos, who will launch on Sept. 24, Kazakh time from the Baikonur Cosmodrome in Kazakhstan on the Soyuz MS-02 vehicle for a five-month mission on the International Space Station. NASA/Victor Zelentsov

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 49-50 backup crewmembers Mark Vande Hei of NASA (right, far left) and Alexander Misurkin (right, center) and Nikolai Tikhonov (right, far right) of Roscosmos report to officials Aug. 30 at the start of final qualification exams. They are serving as backups to prime crewmembers Shane Kimbrough of NASA and Andrey Borisenko and Sergey Ryzhikov of Roscosmos who will launch on Sept. 24 (Kazakh time) on their Soyuz MS-02 vehicle from the Baikonur Cosmodrome in Kazakhstan for a five-month mission on the International Space Station. NASA/Stephanie Stoll

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 49-50 backup crewmembers Mark Vande Hei of NASA (left) and Alexander Misurkin (center) and Nikolai Tikhonov (right) of Roscosmos answer reporters’ questions Aug. 30 at the start of final qualification exams. They are serving as backups to prime crewmembers Shane Kimbrough of NASA and Andrey Borisenko and Sergey Ryzhikov of Roscosmos who will launch on Sept. 24 (Kazakh time) on their Soyuz MS-02 vehicle from the Baikonur Cosmodrome in Kazakhstan for a five-month mission on the International Space Station. NASA/Stephanie Stoll

At their Cosmonaut Hotel crew quarters in Baikonur, Kazakhstan, the Expedition 49 crewmembers participate in a traditional flag-raising ceremony Sept. 10. From left to right are prime crewmembers Shane Kimbrough of NASA, Sergey Ryzhikov and Andrey Borisenko of Roscosmos and backup crewmembers Mark Vande Hei of NASA and Alexander Misurkin and Nikolai Tikhonov of Roscosmos. Kimbrough, Ryzhikov and Borisenko will launch on Sept. 24, Kazakh time from the Baikonur Cosmodrome in Kazakhstan on the Soyuz MS-02 vehicle for a five-month mission on the International Space Station. NASA/Victor Zelentsov

At the Integration Facility at the Baikonur Cosmodrome in Kazakhstan, Expedition 49 backup crewmembers Mark Vande Hei of NASA (left) and Alexander Misurkin (center) and Nikolai Tikhonov (right) of Roscosmos pose for pictures Sept. 9 in front of the Soyuz MS-02 spacecraft during a pre-launch training fit check. They will back up the prime crewmembers, Shane Kimbrough of NASA and Sergey Ryzhikov and Andrey Borisenko of Roscosmos, who will launch Sept. 24, Kazakh time on the Soyuz MS-02 vehicle for a five-month mission on the International Space Station. NASA/Victor Zelentsov

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 49-50 backup crewmember Mark Vande Hei of NASA signs in Aug. 30 for the start of final qualification exams. Vande Hei and Alexander Misurkin and Nikolai Tikhonov of Roscosmos are serving as backups to prime crewmembers Shane Kimbrough of NASA and Andrey Borisenko and Sergey Ryzhikov of Roscosmos who will launch on Sept. 24 (Kazakh time) on their Soyuz MS-02 vehicle from the Baikonur Cosmodrome in Kazakhstan for a five-month mission on the International Space Station. NASA/Stephanie Stoll

At the Integration Facility at the Baikonur Cosmodrome in Kazakhstan, Expedition 49 backup crewmembers Mark Vande Hei of NASA (left) and Alexander Misurkin (center) and Nikolai Tikhonov (right) of Roscosmos pose for pictures Sept. 9 in front of the Soyuz MS-02 spacecraft during a pre-launch training fit check. They will back up the prime crewmembers, Shane Kimbrough of NASA and Sergey Ryzhikov and Andrey Borisenko of Roscosmos, who will launch Sept. 24, Kazakh time on the Soyuz MS-02 vehicle for a five-month mission on the International Space Station. NASA/Victor Zelentsov

Expedition 49 backup crewmembers Mark Vande Hei of NASA (left) and Alexander Misurkin (center) and Nikolai Tikhonov (right) of Roscosmos arrive in Baikonur, Kazakhstan Sept. 8 for final pre-launch training after a flight from their base at the Gagarin Cosmonaut Training Center in Star City, Russia. The trio will serve as backups to prime crewmembers Shane Kimbrough of NASA and Sergey Ryzhikov and Andrey Borisenko of Roscosmos, who will launch on Sept. 24, Kazakh time on the Soyuz MS-02 spacecraft for a five-month mission on the International Space Station. NASA/Victor Zelentsov

At the Gagarin Cosmonaut Training Center in Star City, Russia, the Expedition 49 prime and backup crewmembers pose for pictures Sept. 8 before departing on a flight to the launch site at the Baikonur Cosmodrome in Kazakhstan. From left to right are backup crewmembers Mark Vande Hei of NASA and Alexander Misurkin and Nikolai Tikhonov of Roscosmos, and prime crewmembers Shane Kimbrough of NASA (left) and Sergey Ryzhikov (center) and Andrey Borisenko (right) of Roscosmos. Kimbrough, Ryzhikov and Borisenko will launch on Sept. 24, Kazakh time on the Soyuz MS-02 spacecraft for a five-month mission on the International Space Station. NASA/Stephanie Stoll

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 49-50 backup crewmember Alexander Misurkin of Roscosmos signs in Aug. 30 for the start of final qualification exams. Misurkin, Mark Vande Hei of NASA and Nikolai Tikhonov of Roscosmos are serving as backups to prime crewmembers Shane Kimbrough of NASA and Andrey Borisenko and Sergey Ryzhikov of Roscosmos who will launch on Sept. 24 (Kazakh time) on their Soyuz MS-02 vehicle from the Baikonur Cosmodrome in Kazakhstan for a five-month mission on the International Space Station. NASA/Stephanie Stoll

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 49 backup crewmembers Alexander Misurkin (far right) and Nikolai Tikhonov (second from right) of Roscosmos and Mark Vande Hei of NASA (third from right) say goodbye to well-wishers Sept. 8 before boarding busses that took them and prime crewmembers Shane Kimbrough of NASA and Andrey Borisenko and Sergey Ryzhikov of Roscosmos to nearby Chkalovsky Airfield and a flight to the launch site at the Baikonur Cosmodrome in Kazakhstan. Kimbrough, Ryzhikov and Borisenko will launch on Sept. 24, Kazakh time on the Soyuz MS-02 spacecraft for a five-month mission on the International Space Station. NASA/Stephanie Stoll

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 49-50 backup crewmembers Mark Vande Hei of NASA (left) and Alexander Misurkin (center) and Nikolai Tikhonov (right) of Roscosmos pose for pictures Aug. 30 at the start of final qualification exams. They are serving as backups to prime crewmembers Shane Kimbrough of NASA and Andrey Borisenko and Sergey Ryzhikov of Roscosmos who will launch on Sept. 24 (Kazakh time) on their Soyuz MS-02 vehicle from the Baikonur Cosmodrome in Kazakhstan for a five-month mission on the International Space Station. NASA/Stephanie Stoll

The Expedition 49 backup crewmembers lay flowers at the statue of Soviet rocket Great Designer Sergey Korolev during a tour of the city of Baikonur, Kazakhstan Sept. 10. From left to right in their flight suits are Mark Vande Hei of NASA and Alexander Misurkin and Nikolai Tikhonov of Roscosmos. They are serving as backups to Shane Kimbrough of NASA and Sergey Ryzhikov and Andrey Borisenko of Roscosmos, who will launch on Sept. 24, Kazakh time from the Baikonur Cosmodrome in Kazakhstan on the Soyuz MS-02 vehicle for a five-month mission on the International Space Station. NASA/Victor Zelentsov

Expedition 49 flight engineer Shane Kimbrough of NASA left, and Soyuz commander Sergey Ryzhikov take part in the traditional tree planing ceremony at the Cosmonaut Hotel on Friday, Sept. 16, 2016 in Baikonur, Kazakhstan. Kimbrough, Ryzhikov and flight engineer Andrey Borisenko of Roscosmos are scheduled to launch to the International Space Station aboard the Soyuz MS-02 spacecraft from the Baikonur Cosmodrome on September 24 Kazakh time. Photo Credit: (NASA/Victor Zelentsov)