Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, second form left, and Russian cosmonaut Pyotr Dubrov of Roscosmos, third from left, and backup crew members Russian cosmonaut Anton Shkaplerov of Roscosmos, third from right, NASA astronaut Anne McClain, second from right, and Russian cosmonaut Oleg Artemyev of Roscosmos, right, pose for a photo in front of the Tsar Bell in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021 in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew member, Anne McClain of NASA signs a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), as her crew mates watch, Wednesday, March 24, 2021 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/GCTC/Irina Spector)

Expedition 52 flight engineer Paolo Nespoli of ESA lays roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 NASA astronaut Peggy Whitson, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and ESA astronaut Thomas Pesquet visit Red Square to lay roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, Oct. 26, 2016, in Moscow. Photo Credit: (NASA/Bill Ingalls)

From left to right, Expedition 64 prime crew members, NASA astronaut Kate Rubins, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos and Expedition 64 backup crew members, Russian cosmonaut Petr Dubrov of Roscosmos (right), NASA astronaut Mark Vande Hei, and Russian cosmonaut Oleg Novitskiy of Roscosmos, visit Red Square to lay flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 64 prime crew member, Kate Rubins of NASA lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 at Red Square in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew members Russian cosmonaut Anton Shkaplerov, left, NASA astronaut Anne McClain, second from left, prime crew members NASA astronaut Mark Vande Hei, third from left, Russian cosmonaut Oleg Novitskiy of Roscosmos, third from right, and Russian cosmonaut Pyotr Dubrov of Roscosmos, second from right, and backup crew member Russian cosmonaut Oleg Artemyev of Roscosmos, right, pose for a photo in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021 in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 prime crew member, Mark Vande Hei of NASA signs a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), as his crew mates watch, Wednesday, March 24, 2021 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/GCTC/Irina Spector)

Expedition 65 prime crew members NASA astronaut Mark Vande Hei, left, and Russian cosmonaut Pyotr Dubrov of Roscosmos, center, watch as Russian cosmonaut Oleg Novitskiy of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. 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, Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos and Expedition 64 backup crew members, NASA astronaut Mark Vande Hei, Russian cosmonaut Oleg Novitskiy of Roscosmos, and Russian cosmonaut Petr Dubrov of Roscosmos, pose for a photo in front of the Tsar Cannon in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew member Russian cosmonaut Anton Shkaplerov of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 prime crew member, Pyotr Dubrov of Roscosmos signs a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), as his crew mates watch, Wednesday, March 24, 2021 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/GCTC/Irina Spector)

Expedition 64 backup crew member, Mark Vande Hei of NASA lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 at Red Square in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 50 NASA astronaut Peggy Whitson, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and ESA astronaut Thomas Pesquet visit Red Square to lay roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, Oct. 26, 2016, in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and Russian cosmonaut Mikhail Kornienko of Roscosmos pose for a photograph in front of St. Basil's Cathedral in Moscow as part of traditional pre-launch ceremonies, Friday, March 6, 2015. The trio is 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 43 prime and backup crews pose for a photograph together in front of St. Basil's Cathedral in Moscow as part of traditional pre-launch ceremonies, from left, Expedition 43 backup crew members; NASA Astronaut Jeff Williams, Russian cosmonaut Sergei Volkov of the Russian Federal Space Agency (Roscosmos), Russian cosmonaut Alexei Ovchinin of Roscosmos, Expedition 43 prime crew members; NASA Astronaut Scott Kelly, Russian cosmonaut Gennady Padalka of Roscosmos, and Russian cosmonaut Mikhail Kornienko of Roscosmos, Friday, March 6, 2015. Kelly, Padalka, and Kornienko 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 prime crew members, NASA astronaut Kate Rubins, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos pose for a photo in front of the Tsar Bell in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 64 prime crew member Sergey Ryzhikov of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 64 backup crew member, Petr Dubrov of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 at Red Square in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 prime crew members NASA astronaut Mark Vande Hei, left, and Russian cosmonaut Oleg Novitskiy of Roscosmos, second from left, and backup crew members NASA astronaut Anne McClain, third from left, and Russian cosmonaut Anton Shkaplerov of Roscosmos, second from right watch as prime crew member Russian cosmonaut Pyotr Dubrov of Roscosmos, right, lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. 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, Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos and Expedition 64 backup crew members, NASA astronaut Mark Vande Hei, Russian cosmonaut Oleg Novitskiy of Roscosmos, and Russian cosmonaut Petr Dubrov of Roscosmos, pose for a photo in front of the Tsar Bell in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

From left to right, Expedition 64 backup crew members NASA astronaut Mark Vande Hei, Russian cosmonaut Oleg Novitskiy of Roscosmos, Russian cosmonaut Petr Dubrov of Roscosmos, and 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 Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 prime crew member NASA astronaut Mark Vande Hei lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 prime crew member Russian cosmonaut Pyotr Dubrov of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 prime crew member Russian cosmonaut Oleg Novitskiy of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 prime crew members, NASA astronaut Kate Rubins, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos pose for a photo in front of the Tsar Cannon in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 52 flight engineers Paolo Nespoli of ESA, left, Randy Bresnik of NASA, Sergey Ryazanskiy of Roscosmos, and backup crew members, Alexander Misurkin of Roscosmos, Mark Vande Hei of NASA, and Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA), right, pose for a group photograph in Red Square after having laid roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 52 flight engineer Randy Bresnik of NASA salutes after laying roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 64 backup crew member, Oleg Novitskiy of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 at Red Square in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 52 flight engineers Paolo Nespoli of ESA, left, Sergey Ryazanskiy of Roscosmos, center, and Randy Bresnik of NASA visit Red Square prepare to lay roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 52 backup crew member Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA) lays roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 backup crew member NASA astronaut Anne McClain lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and Russian cosmonaut Mikhail Kornienko of Roscosmos walk along the Kremlin Wall in Red Square to leave roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Friday, March 6, 2015, Moscow, Russia. The trio is 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 65 backup crew member Russian cosmonaut Oleg Artemyev of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021, at Red Square in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 64 prime crew member Sergey Ryzhikov of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 at Red Square in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 52 flight engineers Paolo Nespoli of ESA, left, Sergey Ryazanskiy of Roscosmos, center, and Randy Bresnik of NASA visit Red Square to lay roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Pyotr Dubrov of Roscosmos visit Red Square to lay flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021 in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 backup crew members Russian cosmonaut Anton Shkaplerov, left, NASA astronaut Anne McClain, second from left, prime crew members NASA astronaut Mark Vande Hei, third from left, Russian cosmonaut Oleg Novitskiy of Roscosmos, third from right, and Russian cosmonaut Pyotr Dubrov of Roscosmos, second from right, and backup crew member Russian cosmonaut Oleg Artemyev of Roscosmos, right, pose for a photo in front of the Tsar Cannon in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021 in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 52 backup crew members Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA), left, Alexander Misurkin of Roscosmos, center, and Mark Vande Hei of NASA pose for a photograph in front of Saint Basil's Cathedral as they visited Red Square to lay roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Expedition 64 prime crew members, NASA astronaut Kate Rubins, left, Russian cosmonaut Sergey Ryzhikov of Roscosmos, center, and Russian cosmonaut Sergey Kud-Sverchkov of Roscosmos visit Red Square to lay flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Pyotr Dubrov of Roscosmos, right, pose for a photo in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021 in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 65 prime crew member, Oleg Novitskiy of Roscosmos signs a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), as his crew mates watch, Wednesday, March 24, 2021 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/GCTC/Irina Spector)

Expedition 64 prime crew member Sergey Kud-Sverchkov of Roscosmos lays flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Thursday, Sept. 24, 2020 at Red Square in Moscow. Photo Credit: (NASA/GCTC/Irina Spector)

Expedition 65 backup crew member, Anton Shkaplerov of Roscosmos signs a guest book at the "Memorial working study of Yuri Gagarin" at the Gagarin Cosmonaut Training Center (GCTC), as his crew mates watch, Wednesday, March 24, 2021 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/GCTC/Irina Spector)

Expedition 65 prime crew members, NASA astronaut Mark Vande Hei, left, Russian cosmonaut Oleg Novitskiy of Roscosmos, center, and Russian cosmonaut Pyotr Dubrov of Roscosmos, right, pose for a photo in front of the Tsar Bell in Red Square after laying flowers at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Wednesday, March 24, 2021 in Moscow. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 52 backup crew members Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA), left, Alexander Misurkin of Roscosmos, center, and Mark Vande Hei of NASA lay roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)