Expedition 49 Russian cosmonaut Sergei Ryzhikov of Roscosmos dons his Russian Sokol suit ahead of the Soyuz qualification exams with fellow Russian cosmonaut Andrey Borisenko of Roscosmos and NASA astronaut Shane Kimbrough, Wednesday, Aug. 31, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 prime crew member Oleg Novitskiy of Roscosmos, holds up a toy cat that will be used in the Soyuz capsule to help indicate the start of weightlessness after leaving the Earth’s atmosphere, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

From left to right, Expedition 64 prime crew members, NASA astronaut Kate Rubins, Russian cosmonaut Sergey Ryzhikov of Roscosmos, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos, pose for a photo at the conclusion of a press conference prior to their scheduled launch October 14 from the Baikonur Cosmodrome in Kazakhstan, Thursday, Sept. 24, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 crew member NASA astronaut Mark Vande Hei, signs in for Soyuz qualification exams while crew mates Russian cosmonaut Oleg Novitskiy of Roscosmos, left, and Russian cosmonaut Pyotr Dubrov of Roscosmos look on, Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 prime crew members, Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and NASA astronaut Kate Rubins, pose for a photo after a press conference, Thursday, Sept. 24, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 28 crew members, Flight Engineer Mike Fossum, left, Soyuz commander Sergei Volkov, center, and Flight Engineer Satoshi Furukawa, pose for a photograph on the grounds of the Gagarin Cosmonaut Training Center, Wednesday, May 25, 2011 in Star City, Russia. The crew later departed for Baikonur, Kazakhstan in preparation for their June launch onboard a Soyuz rocket. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 crew members ESA astronaut Thomas Pesquet, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and NASA astronaut Peggy Whitson report to mission managers for their final qualification exams, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

From left to right, Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, Russian cosmonaut Pyotr Dubrov of Roscosmos, and Russian cosmonaut Oleg Novitskiy of Roscosmos, wave goodbye after boarding the bus to their flight to Baikonur for launch from the Baikonur Cosmodrome, Friday, March 26, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

A Soyuz TMA spacecraft mockup is seen at the Gagarin Cosmonaut Training Center, Monday, April 23, 2012 in Star City, Russia. Expedition 31 prime and backup crew members train in the Soyuz mockup in preparation for final flight to the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 65 crew members Russian cosmonaut Pyotr Dubrov of Roscosmos, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and NASA astronaut Mark Vande Hei, pose for a photo during qualification exams, Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 crew member Sergey Ryzhikov of Roscosmos is seen during Soyuz qualification exams Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch October 14 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew member, Anne McClain of NASA signs in for Soyuz qualification exams Monday, March 22, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

Expedition 50 crew members NASA astronaut Peggy Whitson, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and ESA astronaut Thomas Pesquet report to mission managers for their final qualification exams, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 crew members NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Pyotr Dubrov of Roscosmos meet with mission managers ahead of their Soyuz qualification exams, Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew members NASA astronaut Anne McClain, left, Russian cosmonaut Anton Shkaplerov of Roscosmos, center, and Russian cosmonaut Oleg Artemyev of Roscosmos meet with mission managers during Soyuz qualification exams Monday, March 22, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Irina Spector)

Family of Expedition 65 prime crew member, Russian cosmonaut Oleg Novitskiy of Roscosmos, bids him farewell prior to his departure to Baikonur for launch from the Baikonur Cosmodrome, Friday, March 26, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

From left to right, Expedition 64 prime crew members, NASA astronaut Kate Rubins, Russian cosmonaut Sergey Ryzhikov of Roscosmos, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos, pose for a photo at the conclusion of a press conference prior to their scheduled launch October 14 from the Baikonur Cosmodrome in Kazakhstan, Thursday, Sept. 24, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 crew member Sergey Ryzhikov of Roscosmos signs in for his Soyuz qualification exams as crew mates Kate Rubins of NASA, left, and Sergey Kud-Sverchkov of Roscosmos, right, look on, Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 64 prime crew member Sergey Kud-Sverchkov holds up a knitted cosmonaut named Yuri that was made by his wife during a press conference prior to his launch from the Baikonur Cosmodrome in Kazakhstan, Thursday, Sept. 24, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 52 flight engineer Paolo Nespoli of ESA is seen during a crew press conference at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 49 NASA astronaut Shane Kimbrough, Russian cosmonauts Sergei Ryzhikov and Andrey Borisenko of Roscosmos are seen on monitors in a control room as they participate in their Soyuz qualification exams, Wednesday, Aug. 31, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

The prime and backup crew members for Expedition 28 to the International Space Station pose for pictures on the grounds of the Gagarin Cosmonaut Training Center, from left to right are NASA astronaut and backup flight engineer Don Pettit, Russian cosmonaut and backup Soyuz commander Oleg Kononenko, European Space Agency astronaut and backup flight engineer Andre Kuipers, NASA astronaut and prime crew flight engineer Mike Fossum, Russian cosmonaut and prime Soyuz commander Sergei Volkov, Japan Aerospace astronaut and prime crew flight engineer Satoshi Furukawa. The crew later departed for Baikonur, Kazakhstan in preparation for their June launch onboard a Soyuz rocket. Photo Credit: (NASA/Bill Ingalls)

Expedition 52 flight engineer Randy Bresnik of NASA is seen during a crew press conference at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 backup crew members NASA astronaut Anne McClain, left, Russian cosmonaut Anton Shkaplerov of Roscosmos, center, and Russian cosmonaut Oleg Artemyev of Roscosmos arrive for Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

From left to right, Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, Russian cosmonaut Pyotr Dubrov of Roscosmos, and Russian cosmonaut Oleg Novitskiy of Roscosmos, are seen during a press conference prior to their launch from Baikonur Cosmodrome, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 crew members NASA astronaut Mark Vande Hei, right, and Russian cosmonaut Oleg Novitskiy of Roscosmos, left, are seen during Soyuz qualification exams Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 50 crew members NASA astronaut Peggy Whitson, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and ESA astronaut Thomas Pesquet walk out from suitup for their final qualification exams, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 crew member Pyotr Dubrov of Roscosmos, signs in for Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 crew members NASA astronaut Kate Rubins, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos arrive for Soyuz qualification exams Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch October 14 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 crew members NASA astronaut Kate Rubins, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos arrive for Soyuz qualification exams Tuesday, Sept. 22, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch October 14 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew member NASA astronaut Anne McClain, speaks during a press conference prior to the prime crew’s launch from the Baikonur Cosmodrome in Kazakhstan, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew member, Anton Shkaplerov of Roscosmos is seen during Soyuz qualification exams Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 crew members Russian cosmonaut Pyotr Dubrov of Roscosmos, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and NASA astronaut Mark Vande Hei, pose for a photo during qualification exams, Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 crew member Sergey Ryzhikov of Roscosmos signs in for Soyuz qualification exams as crew mate Sergey Kud-Sverchkov of Roscosmos looks on, Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 50 backup crew members, NASA astronaut Jack Fisher, left, Russian cosmonaut Fyodor Yurchikhin of Roscosmos, center, and ESA astronaut Paolo Nespoli, left, answer questions from the press ahead of their Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

From left to right, Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, Russian cosmonaut Pyotr Dubrov of Roscosmos, and Russian cosmonaut Oleg Novitskiy of Roscosmos, wave goodbye after boarding the bus to their flight to Baikonur for launch from the Baikonur Cosmodrome, Friday, March 26, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 crew members NASA astronaut Kate Rubins, left, Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos, center, and Russian cosmonaut Sergey Ryzhikov of Roscosmos, listen during a press conference prior to their launch from the Baikonur Cosmodrome in Kazakhstan, Thursday, Sept. 24, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Kud-Sverchkov is holding a knit cosmonaut named Yuri that his wife made for him to take along for the launch. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 crew members Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and NASA astronaut Kate Rubins, right, pose for a photo during Soyuz qualification exams Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 64 backup crew members NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Petr Dubrov of Roscosmos arrive for Soyuz qualification exams Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 52 backup crew member Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA) is seen during a crew press conference at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

NASA flight engineer Joe Acaba is seen training in a mockup of the International Space Station Zvezda service module, Monday, April 23, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Acaba, Soyuz commander Gennady Padalk and flight engineer Sergei Revin are set to launch May 15 from the Baikonur Cosmodrome in their Soyuz TMA-04M spacecraft to the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 50 crew members ESA astronaut Thomas Pesquet, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and NASA astronaut Peggy Whitson answer reporter's questions ahead of their final qualification exams, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 NASA Astronaut Scott Kelly, gives a thumbs up as he boards a bus to depart the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, for his flight to Baikonur, Kazakhstan, with fellow crew members, Russian Cosmonauts Mikhail Kornienko, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos), Saturday, March 14, 2015. The trio are preparing for launch to the International Space Station in their Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 28 crew members, Flight Engineer Satoshi Furukawa, left, Soyuz commander Sergei Volkov, center, and Flight Engineer Mike Fossum, answer reporters questions during a crew departure press conference held on the grounds of the Gagarin Cosmonaut Training Center, Wednesday, May 25, 2011 in Star City, Russia. The crew later departed for Baikonur, Kazakhstan in preparation for their June launch onboard a Soyuz rocket. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 crew members NASA astronaut Peggy Whitson, Russian cosmonaut Oleg Novitskiy of Roscosmos, and ESA astronaut Thomas Pesquet are monitored in a central room during the crew's Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 29 Commander Mike Fossum, left, Russian cosmonaut Sergei Volkov and Japanese Aerospace Exploration Agency astronaut Satoshi Furukawa, right, are seen in front of a statue of Yuri Gagarin at the Gagarin Cosmonaut Training Center in Star City, Russia as part of a traditional welcome home ceremony on Thursday, Dec. 15, 2011. The crew landed on the steppes of Kazakhstan on November 22nd after spending five months living and working aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 64 backup crew member Oleg Novitskiy of Roscosmos signs in for Soyuz qualification exams while NASA astronaut Mark Vande Hei, left, and Russian cosmonaut Petr Dubrov of Roscosmos, right, look on, Tuesday, Sept. 22, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

The Soyuz simulator is seen as Expedition 49 NASA astronaut Shane Kimbrough, Russian cosmonauts Sergei Ryzhikov and Andrey Borisenko of Roscosmos, Wednesday, Aug. 31, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

The interior of the Soyuz simulator is seen as Expedition 49 NASA astronaut Shane Kimbrough, Russian cosmonauts Sergei Ryzhikov and Andrey Borisenko of Roscosmos take their Soyuz qualification exams, Wednesday, Aug. 31, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 Russian cosmonaut Oleg Novitskiy of Roscosmos smiles as he listens to a reporter's question ahead of the final qualification exams with fellow crew mates NASA astronaut Peggy Whitson and ESA astronaut Thomas Pesquet, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 64 crew members NASA astronaut Kate Rubins, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos arrive for Soyuz qualification exams Tuesday, Sept. 22, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch October 14 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew member, Anton Shkaplerov of Roscosmos, is seen during Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew members NASA astronaut Anne McClain, left, Russian cosmonaut Anton Shkaplerov of Roscosmos, center, and Russian cosmonaut Oleg Artemyev of Roscosmos meet with mission managers during Soyuz qualification exams Monday, March 22, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 50 crew members NASA astronaut Peggy Whitson, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and ESA astronaut Thomas Pesquet prepare for their final qualification exams, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 crew members NASA astronaut Peggy Whitson, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and ESA astronaut Thomas Pesquet meet with mission managers ahead of their Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 prime crew member, NASA astronaut Mark Vande Hei, waves goodbye after boarding the bus to his flight to Baikonur for launch from the Baikonur Cosmodrome, Friday, March 26, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 52 flight engineers Paolo Nespoli of ESA, seated left, Sergey Ryazanskiy of Roscosmos, seated center, Randy Bresnik of NASA, seated right, joined by backup crew members, Norishige Kanai, standing left, Alexander Misurkin, not pictured, and Mark Vande Hei, right, are seen as they sign a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. The memorial study represents Gagarin's working study in the way it was abandoned by Gagarin on March 27, 1968 before leaving for the airfield for training flight that became his last. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 crew members Russian cosmonaut Pyotr Dubrov of Roscosmos, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and NASA astronaut Mark Vande Hei, pose for a photo during qualification exams, Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, second from left, and Russian cosmonaut Pyotr Dubrov of Roscosmos, second from right, are seen walking with friends and family during an official farewell ceremony prior to their departure to Baikonur for launch from the Baikonur Cosmodrome, Friday, March 26, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 50 ESA astronaut Thomas Pesquet listens to a reporter's question ahead of the final qualification exams with fellow crew mates Russian cosmonaut Oleg Novitskiy of Roscosmos and NASA astronaut Peggy Whitson, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 crew member NASA astronaut Mark Vande Hei is seen during Soyuz qualification exams Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Friends and family join in for a photo with Expedition 65 backup crew members, Russian cosmonaut Oleg Artemyev of Roscosmos, second from left, Russian cosmonaut Anton Shkaplerov of Roscosmos, third from left, NASA astronaut Anne McClain, fourth from left, and Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, fifth from left, Russian cosmonaut Oleg Novitskiy of Roscosmos, fourth from right, and Russian cosmonaut Pyotr Dubrov of Roscosmos, third from right, during an official farewell ceremony prior to their departure to Baikonur for the prime crew’s launch from the Baikonur Cosmodrome, Friday, March 26, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 crew member Mark Vande Hei of NASA, arrives for Soyuz qualification exams Saturday, March 20, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

International Space Station mockup training modules are seen at the Gagarin Cosmonaut Training Center, Monday, April 23, 2012 in Star City, Russia. Expedition 31 prime and backup crew members train in these moduls in preparation for final flight to the International Space Station. Photo Credit: (NASA/Carla Cioffi)

From left to right, Expedition 65 backup crew members NASA astronaut Anne McClain, Russian cosmonaut Oleg Artemyev of Roscosmos, Russian cosmonaut Anton Shkaplerov of Roscosmos, and Expedition 65 prime crew members, Russian cosmonaut Oleg Novitskiy of Roscosmos, Russian cosmonaut Pyotr Dubrov of Roscosmos and NASA astronaut Mark Vande Hei, are seen during a press conference prior to the prime team’s launch from Baikonur Cosmodrome, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

An Expedition 31 crew member's hand is seen at the controls inside the Soyuz TMA mockup Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. The crew perform final qualification tests in preparation for their launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

From left to right, Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, Russian cosmonaut Oleg Novitskiy of Roscosmos, Russian cosmonaut Pyotr Dubrov of Roscosmos, and Expedition 65 backup crew members Russian cosmonaut Anton Shkaplerov of Roscosmos, NASA astronaut Anne McClain, and Russian cosmonaut Oleg Artemyev of Roscosmos, pose for a photo after a press conference prior to the prime team’s launch from Baikonur Cosmodrome, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 crew members NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Pyotr Dubrov of Roscosmos wave during Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 43 NASA Astronaut Scott Kelly, left, and Russian Cosmonauts Mikhail Kornienko, center, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos) walk with family and friends as they depart the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, for Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio are preparing for launch to the International Space Station in their Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 64 crew member Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos signs in for Soyuz qualification exams as NASA astronaut Kate Rubins, left, and Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, look on, Tuesday, Sept. 22, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew member NASA astronaut Anne McClain signs in for Soyuz qualification exams while Russian cosmonaut Anton Shkaplerov of Roscosmos, left, and Russian cosmonaut Oleg Artemyev of Roscosmos look on, Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

From left to right, Expedition 64 prime crew members, NASA astronaut Kate Rubins, Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos, and Russian cosmonaut Sergey Ryzhikov of Roscosmos, and Expedition 64 backup crew members Russian cosmonaut Oleg Novitskiy of Roscosmos, Russian cosmonaut Petr Dubrov of Roscosmos, and NASA astronaut Mark Vande Hei, greet media at a press conference prior to their scheduled launch from the Baikonur Cosmodrome in Kazakhstan, Thursday, Sept. 24, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Engineers in a nearby control room monitor Expedition 50 crew members ESA astronaut Thomas Pesquet, Russian cosmonaut Oleg Novitskiy of Roscosmos, and NASA astronaut Peggy Whitson as they perform their final qualification exams in a Soyuz simulator, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 52 flight engineer Paolo Nespoli of ESA signs a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. The memorial study represents Gagarin's working study in the way it was abandoned by Gagarin on March 27, 1968 before leaving for the airfield for training flight that became his last. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 NASA astronaut Peggy Whitson smiles as she listens to a reporter's question ahead of the final qualification exams with fellow crew mates Russian cosmonaut Oleg Novitskiy of Roscosmos and ESA astronaut Thomas Pesquet, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 crew member Pyotr Dubrov of Roscosmos, is seen during Soyuz qualification exams Saturday, March 20, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 backup crew member Oleg Novitskiy of Roscosmos is seen during a press conference, Thursday, Sept. 24, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 crew member Oleg Novitskiy of Roscosmos, signs in for Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 49 NASA astronaut Shane Kimbrough, left, Russian cosmonaut Sergei Ryzhikov of Roscosmos, center, and Russian cosmonaut Andrey Borisenko of Roscosmos prepare to enter the Soyuz simulator ahead of their Soyuz qualification exams, Wednesday, Aug. 31, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 prime crew member Russian cosmonaut Pyotr Dubrov of Roscosmos waves during a press conference prior to his launch from the Baikonur Cosmodrome in Kazakhstan, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew member, Anton Shkaplerov of Roscosmos signs in for Soyuz qualification exams Monday, March 22, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 49 NASA astronaut Shane Kimbrough dons his Russian Sokol suit ahead of the Soyuz qualification exams with Russian cosmonaut Sergei Ryzhikov and Russian cosmonaut Andrey Borisenko of Roscosmos, Wednesday, Aug. 31, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 ESA astronaut Thomas Pesquet is seen inside the Soyuz simulator during final qualification exams, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Pesquet, Russian cosmonaut Oleg Novitskiy of Roscosmos, and NASA astronaut Peggy Whitson are scheduled to launch in November 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 64 crew member Sergey Kud-Sverchkov of Roscosmos arrives for Soyuz qualification exams Tuesday, Sept. 22, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch October 14 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew member, Anne McClain of NASA, is seen during Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 backup crew members NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Petr Dubrov of Roscosmos arrive for Soyuz qualification exams Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 64 crew members Sergey Ryzhikov of Roscosmos, left, Kate Rubins of NASA ,center, and Sergey Kud-Sverchkov of Roscosmos arrive for Soyuz qualification exams Wednesday, Sept. 23, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch October 14 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 50 crew members NASA astronaut Peggy Whitson, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and ESA astronaut Thomas Pesquet laugh together as they prepare for their final qualification exams, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 52 flight engineers Sergey Ryazanskiy of Roscosmos, seated left, and Randy Bresnik of NASA are seen as they sign a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. The memorial study represents Gagarin's working study in the way it was abandoned by Gagarin on March 27, 1968 before leaving for the airfield for training flight that became his last. Photo Credit: (NASA/Bill Ingalls)

Expedition 64 crew member Sergey Ryzhikov of Roscosmos arrives for Soyuz qualification exams Tuesday, Sept. 22, 2020 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of his scheduled launch October 14 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew member Oleg Artemyev of Roscosmos is seen with crew mates NASA astronaut Anne McClain, left, and Anton Shkaplerov of Roscosmos during Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 50 ESA astronaut Thomas Pesquet dons his Sokol suit ahead of his final qualification exams with fellow crew mates NASA astronaut Peggy Whitson and Russian cosmonaut Oleg Novitskiy of Roscosmos, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 backup crew members Russian cosmonaut Oleg Artemyev of Roscosmos, left, Russian cosmonaut Anton Shkaplerov of Roscosmos, center, and NASA astronaut Anne McClain, pose for a photo during Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 crew members NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Pyotr Dubrov of Roscosmos arrive for Soyuz qualification exams Monday, March 22, 2021, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of their scheduled launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew member Russian cosmonaut Oleg Artemyev of Roscosmos is seen during a press conference prior to the prime crew’s launch from the Baikonur Cosmodrome in Kazakhstan, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew member Russian cosmonaut Oleg Artemyev speaks during a press conference prior to the prime crew’s launch from the Baikonur Cosmodrome in Kazakhstan, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew member, Anne McClain of NASA is seen during Soyuz qualification exams Saturday, March 20, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, in advance of the Expedition 65 launch April 9 from Baikonur Cosmodrome in Kazakhstan to the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 crew members NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Pyotr Dubrov of Roscosmos, pose for a photo after a press conference prior to their launch from the Baikonur Cosmodrome, Wednesday, March 24, 2021 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 50 ESA astronaut Thomas Pesquet dons his Sokol suit ahead of his final qualification exams with fellow crew mates NASA astronaut Peggy Whitson and Russian cosmonaut Oleg Novitskiy of Roscosmos, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 ESA astronaut Thomas Pesquet dons his Sokol suit ahead of his final qualification exams with fellow crew mates NASA astronaut Peggy Whitson and Russian cosmonaut Oleg Novitskiy of Roscosmos, Tuesday, Oct. 25, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)