Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, left, and Flight Engineer Reid Wiseman of NASA, right, are seen as they talk with family members after having their Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-13M spacecraft on Wednesday, May 28, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Wiseman, Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, and Flight Engineer Alexander Gerst of the European Space Agency, ESA, is scheduled to launch at 1:57 a.m. Kazakhstan time on Thursday, May 29. Photo Credit: (NASA/Joel Kowsky)

Expedition 39 backup crew member Elena Serova of the Russian Federal Space Agency, Roscosmos, is seen in quarantine, behind glass, during the final press conference held ahead of the launch of Expedition 39 prime crew members; Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Flight Engineer Steve Swanson of NASA, and Flight Engineer Oleg Artemyev of Roscosmos, to the International Space Station, Monday, March 24, 2014 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

General Director of the Russian Federal Space Agency, Roscosmos, Oleg Ostapenko, as seen during the State Commission meeting to approve the Soyuz rocket launch of Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Flight Engineer Steve Swanson of NASA, and Flight Engineer Oleg Artemyev of Roscosmos on a six month mission aboard the International Space Station, Monday, March 24, 2014 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

jsc2017e136096 - Expedition 54-55 backup crewmembers Jeanette Epps of NASA (left), Sergey Prokopyev of the Russian Federal Space Agency (Roscosmos, center) and Alexander Gerst of the European Space Agency (right) arrive at the launch site at the Baikonur Cosmodrome in Kazakhstan Dec. 4 following a flight from their training base in Star City, Russia. They are serving as backups to the prime crew, Scott Tingle of NASA, Anton Shkaplerov of the Russian Federal Space Agency (Roscosmos) and Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA), who will launch Dec. 17 on the Soyuz MS-07 spacecraft for a five-month mission on the International Space Station...Andrey Shelepin/Gagarin Cosmonaut Training Center.

Pilots position a Russian MI-8 Helicopter for the Soyuz TMA-14M spacecraft landing with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Pilots position a Russian MI-8 Helicopter for the Soyuz TMA-14M spacecraft landing with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The flags of Kazakhstan, Russia, The United States, and the Russian Federal Space Agency (Roscosmos) are seen flying at teh launch pad after the Soyuz TMA-16M spacecraft was rolled out by train at the Baikonur Cosmodrome, Kazakhstan, Wednesday, March 25, 2015. NASA Astronaut Scott Kelly, and Russian Cosmonauts Mikhail Kornienko, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos) are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern 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)

Vladimir Popovkin, Head of the Russian Federal Space Agency (ROSCOSMOS) answers a reporter’s question during a Soyuz post-docking press conference at the Russian Mission Control Center in Korolev, Russia on Friday, June 10, 2011. The Soyuz TMA-02M docked to the International Space Station carrying Expedition 28 Soyuz Commander Sergei Volkov, NASA Flight Engineer Mike Fossum and JAXA (Japanase Aerospace Exploration Agency) Flight Engineer Satoshi Furukawa. Photo Credit: (NASA/Carla Cioffi)

Expedition 39 backup crew member Aleksandr Samokutyaev of the Russian Federal Space Agency, Roscosmos, is seen in quarantine, behind glass, during the final press conference held ahead of the launch of Expedition 39 prime crew members; Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Flight Engineer Steve Swanson of NASA, and Flight Engineer Oleg Artemyev of Roscosmos, to the International Space Station, Monday, March 24, 2014 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Expedition 40 Flight Engineer Alexander Gerst, of the European Space Agency, ESA, left, Soyuz Commander Maxim Suraev, of the Russian Federal Space Agency, Roscosmos, center, and Flight Engineer Reid Wiseman of NASA, right, are seen as they depart the Cosmonaut Hotel on Wednesday, May 28, 2014 in Baikonur, Kazakhstan. Suraev, Gerst, and Wiseman will launch in their Soyuz TMA-13M spacecraft to the International Space Station to begin a five and a half month mission. Photo Credit: (NASA/Joel Kowsky)

Russian Search and Rescue personnel prepare to assist Expedition 37 Flight Engineer Karen Nyberg from the helicopter shortly after her arrival at the Karaganda airport in Kazakhstan, Monday, Nov. 11, 2013. Nyberg, Expedition 37 Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) and Italian Flight Engineer Luca Parmitano landed in a remote area outside of the town of Zhezkazgan after after five and a half months spent on the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 40 Flight Engineer Alexander Gerst of the European Space Agency, ESA, left, Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, center, and Flight Engineer Reid Wiseman of NASA, left, are seen after having their Russian Sokol suits pressure checked in preparation for their launch onboard the Soyuz TMA-13M spacecraft on Wednesday, May 28, 2014 at the Baikonur Cosmodrome in Kazakhstan. The trio is set to launch on a six month mission to the International Space Station onboard the Soyuz TMA-13M spacecraft at 1:57 a.m. Kazakhstan time on Thursday, May 29. Photo Credit: (NASA/Joel Kowsky)

Expedition 39 Flight Engineer Steve Swanson of NASA, left, receives the traditional blessing from a Russian Orthodox priest at the Cosmonaut Hotel prior to his launch on the Soyuz rocket to the International Space Station, Tuesday, March 25, 2014, in Baikonur, Kazakhstan. Swanson, Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, and Flight Engineer Oleg Artemyev of Roscosmos will spend six months living and working aboard the ISS. Photo Credit: (NASA/Joel Kowsky)

Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, speaks with his family after having his Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-13M spacecraft on Wednesday, May 28, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Suraev, Expedition 40 Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA is scheduled to launch at 1:57 a.m. Kazakhstan Time on Thursday, May 29. Photo Credit: (NASA/Joel Kowsky)

Russian support personnel work around the Soyuz TMA-14M spacecraft after it landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Russian support personnel work around the Soyuz TMA-14M spacecraft after it landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Russian MI-8 Helicopters are seen during the Soyuz TMA-14M spacecraft landing with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

A shadow of a Russian MI-8 Helicopter is seen during the Soyuz TMA-14M spacecraft landing with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Oleg Ostapenko, General Director of the Russian Federal Space Agency (Roscosmos), makes remarks during the State Commission meeting to approve the Soyuz launch of Expedition 41 to the International Space Station, Wednesday, Sept. 24, 2014, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for Sept. 26 and will carry Expedition 41 Soyuz Commander Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos), Flight Engineer Barry Wilmore of NASA, and Flight Engineer Elena Serova of Roscosmos into orbit to begin their five and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 43 backup crew members Jeff Williams of NASA, left, and Alexey Ovchinin of Russia's Federal Space Agency (Roscosmos) take a moment during their Soyuz TMA-16M spacecraft fit check to pose for a photograph while holding their pressurized Russian Sokol suits, including the suit of their fellow backup crew member Sergei Volkov, Sunday, March 15, 2015 at the Baikonur Cosmodrome in Kazakhstan. The prime crew members Russian Cosmonauts Mikhail Kornienko, Gennady Padalka of the Russian Federal Space Agency (Roscosmos), and NASA Astronaut Scott Kelly 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/Victor Zelentsov)

Expedition 39 Flight Engineer Oleg Artemyev of the Russian Federal Space Agency, Roscosmos, is helped into his Russian Sokol suit as he and fellow cremates, Soyuz Commander Alexander Skvortsov of Roscosmos, and Flight Engineer Steve Swanson of NASA prepare for their Soyuz launch to the International Space Station, on Tuesday, March, 25, 2014, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Skvortsov, Swanson, and Artemyev on a six-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Irina Peshkova)

Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, is helped into his Russian Sokol suit as he and fellow cremates, Flight Engineer Steve Swanson of NASA and Flight Engineer Oleg Artemyev of Roscosmos prepare for their Soyuz launch to the International Space Station, on Tuesday, March, 25, 2014, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Skvortsov, Swanson, and Artemyev on a six-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Irina Peshkova)

Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, second left, reacts as he is introduced during a press conference, Tuesday, May 27, 2014, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA will launch aboard their Soyuz TMA-13M spacecraft on their mission to the International Space Station in the early hours of May 29. Photo Credit: (NASA/Joel Kowsky)

Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, center, takes a picture with his cell phone during a press conference, Tuesday, May 27, 2014, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA will launch aboard their Soyuz TMA-13M spacecraft on their mission to the International Space Station in the early hours of May 29. Photo Credit: (NASA/Joel Kowsky)

Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, as seen during a press conference, Tuesday, May 27, 2014, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA will launch aboard their Soyuz TMA-13M spacecraft on their mission to the International Space Station in the early hours of May 29. Photo Credit: (NASA/Joel Kowsky)

Oleg Ostapenko, General Director of the Russian Federal Space Agency, Roscosmos, makes remarks during the State Commission meeting held to approve the Soyuz launch of the crew for a five and a half month mission aboard the International Space Station, Tuesday, May 27, 2014 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA will launch about their Soyuz TMA-13M spacecraft in the early hours of May 29. Photo Credit: (NASA/Joel Kowsky)

Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, answers a question during a press conference, Tuesday, May 27, 2014, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA will launch aboard their Soyuz TMA-13M spacecraft on their mission to the International Space Station in the early hours of May 29. Photo Credit: (NASA/Joel Kowsky)

Expedition 40 backup crew member Soyuz Commander Anton Shkaplerov of the Russian Federal Space Agency, Roscosmos, is seen during a press conference, Tuesday, May 27, 2014, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA will launch aboard their Soyuz TMA-13M spacecraft on their mission to the International Space Station in the early hours of May 29. Photo Credit: (NASA/Joel Kowsky)

A member of Russian search and rescue exits a helicopter moments after landing at Zhezkazgan airport in Kazakhstan, Sunday, Nov. 10, 2013, a day ahead of the scheduled landing of the Soyuz TMA-09M spacecraft with Expedition 37 Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos), Flight Engineer Karen Nyberg of NASA and Flight Engineer Luca Parmitano of the European Space Agency. Yurchikhin, Nyberg and Parmitano are returning to Earth after five and a half months on the International Space Station. Photo Credit: (NASA/Carla Cioffi)

A Russian Search and Rescue helicopter is prepared to take off in support of the Soyuz landing of Expedition 33 Commander Sunita Williams of NASA and Flight Engineers Akihiko Hoshide of JAXA (Japan Aerospace Exploration Agency), and Yuri Malenchenko of ROSCOSMOS (Russian Federal Space Agency) near the town of Arkalyk, Kazakhstan, on Monday, Nov. 19, 2012. Williams, Hoshide and Malenchenko returned from four months onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 39 Flight Engineer Oleg Artemyev of the Russian Federal Space Agency, Roscosmos, has his Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-12M spacecraft on Tuesday, March 25, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Artemyev, Expedition 39 Soyuz Commander Alexander Skvortsov of Roscosmos and Flight Engineer Steve Swanson of NASA is scheduled to launch at 3:17 a.m. Kazakhstan time on Wednesday, March 26. Photo Credit: (NASA/Joel Kowsky)

Expedition 39 Flight Engineer Steve Swanson of NASA has his Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-12M spacecraft on Tuesday, March 25, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Swanson, Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, and Flight Engineer Oleg Artemyev of Roscosmos is scheduled to launch at 3:17 a.m. Kazakhstan time on Wednesday, March 26. (NASA/GCTC/Irina Peshkova)

Expedition 39 Flight Engineer Oleg Artemyev of the Russian Federal Space Agency, Roscosmos, speaks with his family during Russian Sokol suit pressure checks in preparation for launch onboard the Soyuz TMA-12M spacecraft on Tuesday, March 25, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Artemyev, Expedition 39 Soyuz Commander Alexander Skvortsov of Roscosmos and Flight Engineer Steve Swanson of NASA is scheduled to launch at 3:17 a.m. Kazakhstan time on Wednesday, March 26. (NASA/Bill Ingalls)

Expedition 39 Flight Engineer Steve Swanson of NASA, center, speaks with his family during Russian Sokol suit pressure checks in preparation for launch onboard the Soyuz TMA-12M spacecraft on Tuesday, March 25, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Swanson, Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, and Flight Engineer Oleg Artemyev of Roscosmos is scheduled to launch at 3:17 a.m. Kazakhstan time on Wednesday, March 26. (NASA/Joel Kowsky)

Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, has his Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-12M spacecraft on Tuesday, March 25, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Skvortsov, Expedition 39 Flight Engineer Steve Swanson of NASA and Flight Engineer Oleg Artemyev of Roscosmos is scheduled to launch at 3:17 a.m. Kazakhstan Time on Wednesday, March 26. Photo Credit: (NASA/GCTC/Irina Peshkova)

jsc2017e136448 - In the Integration Facility at the Baikonur Cosmodrome in Kazakhstan, Expedition 54-55 crewmembers Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA, left), Anton Shkaplerov of the Russian Federal Space Agency (Roscosmos, center) and Scott Tingle of NASA (right) pose for pictures in front of their Soyuz MS-07 spacecraft Dec. 5 as part of their first fit check dress rehearsal activities. They will launch Dec. 17 in the Soyuz MS-07 vehicle for a five-month mission on the International Space Station...Courtesy of Roscosmos.

Expedition 41 Flight Engineer Elena Serova of the Russian Federal Space Agency (Roscosmos), left, receives the traditional blessing from a Russian Orthodox priest at the Cosmonaut Hotel prior to her launch on the Soyuz rocket to the International Space Station (ISS), Thursday, Sept. 25, 2014, in Baikonur, Kazakhstan. She and fellow crew mates, Soyuz Commander Alexander Samokutyaev of Roscosmos, right, and Flight Engineer Barry Wilmore of NASA, not pictured, will spend the next five and a half months living and working aboard the ISS. Wilmore chose not to participate in the blessing. Serova will become the fourth Russian woman to fly in space and the first Russian woman to live and work on the station. Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen after it landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it descends through the fog before landing with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen after it landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 41 Flight Engineer Elena Serova of the Russian Federal Space Agency (Roscosmos), performs the traditional door signing at the Cosmonaut Hotel prior to departing the hotel for launch in a Soyuz rocket with fellow crew mates, Soyuz Commander Alexander Samokutyaev of Roscosmos and Flight Engineer Barry Wilmore of NASA, Thursday, Sept. 25, 2014 in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for the early hours of Sept. 26 Kazakhstan time and will carry Serova, Wilmore, and Samokutyaev into orbit to begin their five and a half month mission on the International Space Station. Serova will become the fourth Russian woman to fly in space and the first Russian woman to live and work on the station. Photo Credit (NASA/Aubrey Gemignani)

Flight Engineer Oleg Artemyev of the Russian Federal Space Agency, Roscosmos, right, receives the traditional blessing from a Russian Orthodox priest at the Cosmonaut Hotel prior to his launch on the Soyuz rocket to the International Space Station, Tuesday, March 25, 2014, in Baikonur, Kazakhstan. Artemyev, Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, and Flight Engineer Steve Swanson of NASA will spend six months living and working aboard the ISS. Photo Credit: (NASA/Bill Ingalls)

The Expedition 46-47 backup crewmembers arrive in Baikonur, Kazakhstan Nov. 30 for final pre-launch preparations. Kate Rubins of NASA (left), Anatoly Ivanishin of the Russian Federal Space Agency (Roscosmos, center) and Takuya Onishi of the Japan Aerospace Exploration Agency (JAXA, right) will serve as backups to the prime crewmembers, Tim Peake of the European Space Agency, Yuri Malenchenko of the Russian Federal Space Agency (Roscosmos) and Tim Kopra of NASA, who will launch Dec. 15 on the Soyuz TMA-19M spacecraft for a six-month mission on the International Space Station. NASA / Victor Zelentsov

Expedition 43 Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) talks with an instructor during an Soyuz TMA-16M Trajectory and Flight Plan briefing, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Padalka, Russian Cosmonaut Mikhail Kornienko of Roscosmos and NASA Astronaut Scott Kelly 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 43 Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) talks with an instructor during an Soyuz TMA-16M Trajectory and Flight Plan briefing, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Padalka, Russian Cosmonaut Mikhail Kornienko of Roscosmos and NASA Astronaut Scott Kelly 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)

A Russian MI-8 Helicopter is seen through the airport bus decal a day before the Soyuz TMA-14M spacecraft landing with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos Wednesday, March 11, 2015 in Karaganda, Kazakhstan. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Gagarin Cosmonaut Training Center (GCTC) Flight Surgeon Alexey Grishin, left, and Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) walk from morning classes at the Cosmonaut Hotel to the crew quarters at the Zvjozdnyj Hotel, Thursday, March 19, 2015 in Baikonur, Kazakhstan. Kornienko, Russian Cosmonaut Gennady Padalka of Roscosmos, and NASA Astoronaut Scott Kelly 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 43 NASA Astronaut Scott Kelly, left, and Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) are seen during an Soyuz TMA-16M Trajectory and Flight Plan briefing, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Padalka, and Russian Cosmonaut Mikhail Kornienko of Roscosmos 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)

A Russian MI-8 Helicopter is seen through the cockpit of another helicopter a day before the Soyuz TMA-14M spacecraft landing with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos Wednesday, March 11, 2015 in Karaganda, Kazakhstan. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) takes a break between classes to make a phone call, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Kornienko, NASA Astronaut Scott Kelly and Russian Cosmonaut Gennady Padalka of Roscosmos 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)

William Gerstenmaier, Associate Administrator for Space Operations, is interviewed by Russian Federal Space Agency (ROSCOSMOS) TV following a Soyuz post-docking press conference at the Russian Mission Control Center in Korolev, Russia on Friday, June 10, 2011. The Soyuz TMA-02M docked to the International Space Station carrying Expedition 28 Soyuz Commander Sergei Volkov, NASA Flight Engineer Mike Fossum and JAXA (Japanase Aerospace Exploration Agency) Flight Engineer Satoshi Furukawa. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) is welcomed home upon his return at Chkalovsky Airport in Russia, Tuesday, May 14, 2013. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) greets his children upon his return home at Chkalovsky Airport in Russia, Tuesday, May 14, 2013. Photo Credit: (NASA/Carla Cioffi)

Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, performs the traditional door signing at the Cosmonaut Hotel prior to departing the hotel for launch in a Soyuz rocket with fellow crew mates, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA, Wednesday, May 28, 2014 in Baikonur, Kazakhstan. Suraev, Gerst, and Wiseman will launch in their Soyuz TMA-13M spacecraft to the International Space Station to begin a five and a half month mission. Photo Credit (NASA/Joel Kowsky)

Expedition 40 Flight Engineer Reid Wiseman of NASA, performs the traditional door signing at the Cosmonaut Hotel prior to departing the hotel for launch in a Soyuz rocket with fellow crew mates, Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, and Flight Engineer Alexander Gerst of the European Space Agency, ESA, Wednesday, May 28, 2014, in Baikonur, Kazakhstan. Wiseman, Suraev, and Gerst will launch in their Soyuz TMA-13M spacecraft to the International Space Station to begin a five and a half month mission. Photo Credit (NASA/Joel Kowsky)

Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, performs the traditional door signing at the Cosmonaut hotel prior to departing the hotel for launch in a Soyuz rocket with fellow crew mates, Flight Engineer Steve Swanson of NASA and Flight Engineer Oleg Artemyev of Roscosmos, Tuesday, March 25, 2014, in Baikonur, Kazakhstan. Skvortsov, Swanson, and Artemyev will launch in their Soyuz TMA-12M spacecraft to the International Space Station to begin a six-month mission. Photo Credit (NASA/Joel Kowsky)

Expedition 39 Flight Engineer Steve Swanson of NASA, left, Soyuz Commander Alexander Skvortsov the Russian Federal Space Agency, Roscosmos, center, and Flight Engineer Oleg Artemyev of Roscosmos, right, are seen as they depart the Cosmonaut Hotel, Tuesday, March 25, 2014, in Baikonur, Kazakhstan. The trio is set to launch on a six month mission to the International Space Station onboard the Soyuz TMA-12M spacecraft at 3:17 a.m. Kazakhstan time on Wednesday, March 26. Photo Credit: (NASA/Joel Kowsky)

Expedition 39 Flight Engineer Steve Swanson of NASA, performs the traditional door signing at the Cosmonaut hotel prior to departing the hotel for launch in a Soyuz rocket with fellow crew mates, Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, and Flight Engineer Oleg Artemyev of Roscosmos, Tuesday, March 25, 2014, in Baikonur, Kazakhstan. Swanson, Skvortsov and, and Artemyev will launch in their Soyuz TMA-12M spacecraft to the International Space Station to begin a six-month mission. Photo Credit (NASA/Joel Kowsky)

Expedition 39 Flight Engineer Oleg Artemyev, left, of the Russian Federal Space Agency, Roscosmos, performs the traditional door signing at the Cosmonaut hotel as Soyuz Commander Alexander Skvortsov of Roscosmos, looks on, Tuesday, March 25, 2014, in Baikonur, Kazakhstan. Artemyev, Skvortsov, and fellow crew member Flight Engineer Steve Swanson of NASA will launch in their Soyuz TMA-12M spacecraft to the International Space Station to begin a six-month mission. Photo Credit (NASA/Joel Kowsky)

Expedition 39 Flight Engineer Oleg Artemyev of the Russian Federal Space Agency, Roscosmos, performs the traditional door signing at the Cosmonaut hotel prior to departing the hotel for launch in a Soyuz rocket with fellow crew mates, Soyuz Commander Alexander Skvortsov of Roscosmos, and Flight Engineer Steve Swanson of NASA, Tuesday, March 25, 2014, in Baikonur, Kazakhstan. Artemyev, Skvortsov, and Swanson will launch in their Soyuz TMA-12M spacecraft to the International Space Station to begin a six-month mission. Photo Credit (NASA/Joel Kowsky)

Expedition 35 NASA Flight Engineer Tom Marshburn is helped off a Russian Search and Rescue helicopter at Karaganda Airport in Kazakhstan following his landing in the Soyuz TMA-07M spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan, Tuesday, May 14, 2013. Marshburn, Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) and Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) returned to earth from more than five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 NASA Flight Engineer Tom Marshburn is helped off a Russian Search and Rescue helicopter at Karaganda Airport in Kazakhstan following his landing in the Soyuz TMA-07M spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan, Tuesday, May 14, 2013. Marshburn, Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) and Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) returned to earth from more than five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 NASA Flight Engineer Tom Marshburn, center, is seen on a Russian Search and Rescue helicopter just before arriving at Karaganda Airport in Kazakhstan following his landing in the Soyuz TMA-07M spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan, Tuesday, May 14, 2013. Marshburn, Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) and Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) returned to earth from more than five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) is helped off a Russian Search and Rescue helicopter at Karaganda Airport in Kazakhstan following his landing in the Soyuz TMA-07M spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan, Tuesday, May 14, 2013. Hadfield, Expedition 35 NASA Flight Engineer Tom Marshburn and Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) returned to earth from more than five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) is helped off a Russian Search and Rescue helicopter at Karaganda Airport in Kazakhstan following his landing in the Soyuz TMA-07M spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan, Tuesday, May 14, 2013. Hadfield, Expedition 35 NASA Flight Engineer Tom Marshburn and Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) returned to earth from more than five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

Expedition 43 NASA Astronaut Scott Kelly sits down for a television interview at the Cosmonaut Hotel, Thursday, March 19, 2015 in Baikonur, Kazakhstan. Kelly, and Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) 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 37 Soyuz Commander Oleg Kotov of the Russian Federal Space Agency (Roscosmos) talks during the State Commission meeting at the Cosmonaut Hotel, Tuesday, Sept. 24, 2013, in Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Kotov, NASA Flight Engineer Michael Hopkins and Russian Flight Engineer Sergei Ryazansky on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37 Russian Flight Engineer Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos) talks during the State Commission meeting at the Cosmonaut Hotel, Tuesday, Sept. 24, 2013, in Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Ryazanskiy, Soyuz Commander Oleg Kotov and NASA Flight Engineer Michael Hopkins on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 39 Flight Engineer Steve Swanson of NASA, left, and Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, right, speak with family members while Flight Engineer Oleg Artemyev of Roscosmos, has his Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-12M spacecraft on Tuesday, March 25, 2014 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Artemyev, Expedition 39 Soyuz Commander Alexander Skvortsov of Roscosmos and Flight Engineer Steve Swanson of NASA is scheduled to launch at 3:17 a.m. Kazakhstan time on Wednesday, March 26.

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) dons his Russian sokol suit ahead of his launch onboard the Soyuz TMA-16M spacecraft to the International Space Station with fellow crew mates, NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka of Roscosmos Friday, March 27, 2015 in Baikonor, Kazakhstan. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) dons his Russian sokol suit ahead of his launch onboard the Soyuz TMA-16M spacecraft to the International Space Station with fellow crew mates, NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka of Roscosmos Friday, March 27, 2015 in Baikonor, Kazakhstan. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/GCTC/Andrey Shelepin)

A Russian MI-8 Helicopter arrives at the Soyuz TMA-14M spacecraft landing site after the soyuz landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

A Russian MI-8 Helicopter arrives at the Soyuz TMA-14M spacecraft landing site after the soyuz landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Russian MI-8 helicopter personnel work on their helicopters at the Soyuz TMA-14M spacecraft landing site shortly after the capsule landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Russian MI-8 helicopter personnel look on at the Soyuz TMA-14M spacecraft landing site shortly after the capsule landed with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 39 primary crew flight engineer Steve Swanson of NASA, Soyuz commander Aleksander Skvortsov of the Russian Federal Space Agency, Roscosmos, flight engineer Oleg Artemyev of Roscosmos and Expedition 39 backup crew Barry Wilmore of NASA, Alexander Samokutyaev of Roscosmos, and Elena Serova of Roscosmos are seen in quarantine, behind glass, during the final press conference be Monday, March 24, 2014, at the Cosmonaut Hotel in Baikonur, Kazakhstan. The mission to the International Space Station is set to launch March 26 from the Baikonur Cosmodrome. Photo Credit: (NASA/Joel Kowsky)

jsc2017e136099 - Expedition 54-55 crewmembers Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA, left), Anton Shkaplerov of the Russian Federal Space Agency (Roscosmos, center) and Scott Tingle of NASA report to Russian space officials upon their arrival Dec. 4 at their launch site at the Baikonur Cosmodrome in Kazakhstan. They will launch Dec. 17 on the Soyuz MS-07 spacecraft for a five-month mission on the International Space Station...Andrey Shelepin/Gagarin Cosmonaut Training Center.

Family, friends, colleagues, and members of the media, watch and photograph Expedition 36/37 Soyuz Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos), Flight Engineers; Karen Nyberg of NASA, and Luca Parmitano of the European Space Agency as they depart the Cosmonaut Hotel, Tuesday, May 28, 2013, in Baikonur, Kazakhstan. Yurichikin, Nyberg, Parmitano were departing the hotel in preparation for their launch on a Soyuz rocket to the International Space Station (ISS) on Wednesday May 29, Kazakh time. Photo credit: (NASA/Bill Ingalls)

Expedition 37 Luca Parmitano of ESA (European Space Agency) is carried to the inflatable medical tent from minutes after he landed in the Soyuz TMA-09M spacecraft in a remote area outside the town of Zhezkazgan, Kazakhstan, on Monday, Nov. 11, 2013. Parmitano, Expedition 37 Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) and NASA Flight Engineer Karen Nyberg returned to earth after five and a half months on the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Family, friends, colleagues, and members of the media, watch and photograph Expedition 36/37 Soyuz Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos), Flight Engineers; Karen Nyberg of NASA, and Luca Parmitano of the European Space Agency as they depart the Cosmonaut Hotel, Tuesday, May 28, 2013, in Baikonur, Kazakhstan. Yurichikin, Nyberg, Parmitano were departing the hotel in preparation for their launch on a Soyuz rocket to the International Space Station (ISS) on Wednesday May 29, Kazakh time. Photo credit: (NASA/Bill Ingalls)

Expedition 37 Luca Parmitano of ESA (European Space Agency) smiles minutes after his landing in the Soyuz TMA-09M spacecraft in a remote area outside the town of Zhezkazgan, Kazakhstan, on Monday, Nov. 11, 2013. Parmitano, Expedition 37 Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) and NASA Flight Engineer Karen Nyberg returned to earth after five and a half months on the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 36/37 Flight Engineer Karen Nyberg of NASA looks out from the bus that will cary her and fellow crew members; Soyuz Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos), and Flight Engineer Luca Parmitano of the European Space Agency from the Cosmonaut Hotel to building 254 where they will don their Sokol suits in preparation for their launch onboard a Soyuz rocket, Tuesday, May 28, 2013, in Baikonur, Kazakhstan. Photo credit: (NASA/Bill Ingalls)

Expedition 33 Commander Sunita Williams of NASA smiles and gives a thumbs up in a chair outside the Soyuz Capsule after she and Flight Engineers Yuri Malenchenko of ROSCOSMOS (Russian Federal Space Agency), and Akihiko Hoshide of JAXA (Japan Aerospace Exploration Agency), landed their Soyuz spacecraft in a remote area outside the town of Arkalyk, Kazakhstan, on Monday, Nov. 19, 2012. Williams, Hoshide and Malenchenko returned from four months onboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 33 Flight Engineer Yuri Malenchenko of ROSCOSMOS (Russian Federal Space Agency) rest in a chair outside the Soyuz Capsule after he and Commander Sunita Williams of NASA, and Flight Engineer Akihiko Hoshide of JAXA (Japan Aerospace Exploration Agency), landed their Soyuz spacecraft in a remote area outside the town of Arkalyk, Kazakhstan, on Monday, Nov. 19, 2012. Williams, Hoshide and Malenchenko returned from four months onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

20140514_2BI6007 Expedition 38/39 Flight Engineer Mikhail Tyurin of the Russian Federal Space Agency (Roscosmos) is welcomed home upon his return at Chkalovsky Airport in Russia, Wednesday, May 14, 2014, a few hours after landing in the Soyuz TMA-11M spacecraft in Kazakhstan. Tyurin, along with Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency and NASA Flight Engineer Rick Mastracchio (not pictured) completed 188 days in space following their launch in November, 2013. Photo Credit: (NASA/Bill Ingalls)

Expedition 33 Flight Engineer Yuri Malenchenko of ROSCOSMOS (Russian Federal Space Agency) is carried to a medical tent shortly after he and Commander Sunita Williams of NASA, and Flight Engineer Akihiko Hoshide of JAXA (Japan Aerospace Exploration Agency), landed their Soyuz spacecraft in a remote area outside the town of Arkalyk, Kazakhstan, on Monday, Nov. 19, 2012. Williams, Hoshide and Malenchenko returned from four months onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Workers place a marker where the Soyuz TMA-05M spacecraft landed with Expedition 33 Commander Sunita Williams of NASA and Flight Engineers Akihiko Hoshide of JAXA (Japan Aerospace Exploration Agency), and Yuri Malenchenko of ROSCOSMOS (Russian Federal Space Agency) in a remote area near the town of Arkalyk, Kazakhstan, on Monday, Nov. 19, 2012. Williams, Hoshide and Malenchenko returned from four months onboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 33 Commander Sunita Williams of NASA is carried to a medical tent shortly after she and Flight Engineers Yuri Malenchenko of ROSCOSMOS (Russian Federal Space Agency), and Akihiko Hoshide of JAXA (Japan Aerospace Exploration Agency), landed their Soyuz spacecraft in a remote area outside the town of Arkalyk, Kazakhstan, on Monday, Nov. 19, 2012. Williams, Hoshide and Malenchenko returned from four months onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)