
The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

The Soyuz MS-04 rocket launches from the Baikonur Cosmodrome in Kazakhstan on Thursday, April 20, 2017 Baikonur time carrying Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. (Photo Credit: NASA/Aubrey Gemignani)

Launch Pad 1 is seen as the Soyuz MS-04 spacecraft is rolled out to the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

The moon is seen behind the Soyuz MS-04 spacecraft at the Baikonur Cosmodrome launch pad on Wednesday, April 19, 2017 in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz MS-04 spacecraft arrives at the launch pad after being rolled there by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz MS-04 spacecraft is rolled out to the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz MS-04 spacecraft is rolled out to the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz MS-04 spacecraft arrives at the launch pad after being rolled there by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

An Orthodox priest blesses the media at the Baikonur Cosmodrome launch pad on Wednesday, April 19, 2017 in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

An Orthodox priest hands out Easter eggs to the media at the Baikonur Cosmodrome launch pad after blessing the Soyuz rocket on Wednesday, April 19, 2017 in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

An Orthodox priest blesses the Soyuz rocket at the Baikonur Cosmodrome launch pad on Wednesday, April 19, 2017 in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

An Orthodox priest blesses the Soyuz rocket at the Baikonur Cosmodrome launch pad on Wednesday, April 19, 2017 in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

An Orthodox priest blesses the media at the Baikonur Cosmodrome launch pad on Wednesday, April 19, 2017 in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Victor Zelentsov)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos has his Russian Sokol suit pressure checked in preparation for launch aboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017, at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13pm April 20 Baikonur time, and will carry Yurchikhin and fellow crewmate, Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos, bottom and Flight Engineer Jack Fischer of NASA, top, wave farewell prior to boarding the Soyuz MS-04 spacecraft for launch, Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Yurchikhin and Fischer will spend the next four and a half months aboard the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 back up crew member, Soyuz Commander Sergey Ryazanskiy of Roscosmos, left, answers a question during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Wednesday, April 19, 2017. He is seen with Expedition 51 back up crew mate Randy Bresnik of NASA. The Expedition 51 prime crew is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 prime crew members, Flight Engineer Jack Fischer of NASA, left, and Soyuz Commander Fyodor Yurchikhin of Roscosmos, second left, are seen with Expedition 51 back up crew members, Soyuz Commander Sergey Ryazanskiy of Roscosmos, second from right, and Flight Engineer Randy Bresnik of NASA, right at the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station in Baikonur, Kazakhstan on Wednesday, April 19, 2017. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

ISS033-E-015399 (23 Oct. 2012) --- This view of Earth’s horizon, shows smoke trails from the launch of the Soyuz TMA-06M spacecraft, was photographed by an Expedition 33 crew member on the International Space Station. The Soyuz, with Expedition 33 crew members Soyuz Commander Oleg Novitskiy, Flight Engineer Kevin Ford of NASA, and Flight Engineer Evgeny Tarelkin of Roscosmos onboard, launched at 4:51 p.m. Kazakhstan time (5:51 a.m. CDT) on Oct. 23, 2012, from Baikonur, Kazakhstan.

The families of Expedition 51 Flight Engineer Jack Fischer of NASA and Soyuz Commander Fyodor Yurchikhin of Roscosmos laugh together before watching the traditional door signing ceremony at the Cosmonaut Hotel prior to the Expedition 51 launch, Thursday, April 20, 2017 in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13pm April 20 Baikonur time, and will carry Yurchikhin and Fischer into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos, right, waves at family and friends from behind glass, while in quarantine, during the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station, Wednesday, April 19, 2017, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Yurchikhin and Flight Engineer Jack Fischer of NASA, left, into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani).

ISS033-E-015394 (23 Oct. 2012) --- This view of Earth’s horizon, shows smoke trails from the launch of the Soyuz TMA-06M spacecraft, was photographed by an Expedition 33 crew member on the International Space Station. The Soyuz, with Expedition 33 crew members Soyuz Commander Oleg Novitskiy, Flight Engineer Kevin Ford of NASA, and Flight Engineer Evgeny Tarelkin of Roscosmos onboard, launched at 4:51 p.m. Kazakhstan time (5:51 a.m. CDT) on Oct. 23, 2012, from Baikonur, Kazakhstan.

ISS033-E-015386 (23 Oct. 2012) --- This view of Earth’s horizon, shows smoke trails from the launch of the Soyuz TMA-06M spacecraft, was photographed by an Expedition 33 crew member on the International Space Station. The Soyuz, with Expedition 33 crew members Soyuz Commander Oleg Novitskiy, Flight Engineer Kevin Ford of NASA, and Flight Engineer Evgeny Tarelkin of Roscosmos onboard, launched at 4:51 p.m. Kazakhstan time (5:51 a.m. CDT) on Oct. 23, 2012, from Baikonur, Kazakhstan.

Expedition 51 NASA Flight Engineer Jack Fischer's family is seen at a pre-launch press conference on Wednesday, April 19, 2017 at the Cosmonaut Hotel in Baikonur, Kazakhstan. From left to right are Fischer's daughter, Sariah, his wife, Elizabeth, and daughter Bethany. Launch of the Expedition 51 crew is scheduled for April 20 and will carry Fischer and Soyuz Commander Fyodor Yurchikhin of Roscosmos into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani).

Expedition 51 Flight Engineer Jack Fischer speaks from behind glass, while in quarantine, during the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station, Wednesday, April 19, 2017, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Fischer and Soyuz Commander Fyodor Yurchikhin of Roscosmos into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

The Expedition 51 backup crew member, Randy Bresnik of NASA, watches as the Soyuz MS-04 spacecraft arrives at the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will send Expedition 51 prime crew, Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA on a four and a half month mission aboard the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 backup crew member Sergey Ryazanskiy of Roscosmos speaks during the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station, Wednesday, April 19, 2017 at the Cosmonaut Hotel in Baikonur, Kazakhstan. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

NASA Expedition 51 backup crew member Randy Bresnik speaks during the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station, Wednesday, April 19, 2017 at the Cosmonaut Hotel in Baikonur, Kazakhstan. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

Igor Komarov, Director of Roscosmos, makes remarks during the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station, Wednesday, April 19, 2017 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Flight Engineer Jack Fischer's daughter Sariah Fischer is interviewed by media at the conclusion of a pre-launch press conference on Wednesday, April 19, 2017 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Fischer and Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 prime crew member Soyuz Commander Fyodor Yurchikhin of Roscosmos, left, laughs with Expedition 51 backup crew member Sergey Ryazanskiy of Roscosmos during a press conference on Wednesday, April 19, 2017 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Yurchikhin and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani).

Expedition 51 backup crew member, Sergey Ryazanskiy of Roscosmos answers a question during a press conference on Wednesday, April 19, 2017 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 prime crew members Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA, into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Family and friends of Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos reacts as they see Yurchikhin enter the International Space Station during a live video feed of the Expedition 51 crew members a few hours after the Soyuz MS-04 spacecraft docked on Thursday, April 20, 2017 at Tsenki Conference Hall in Baikonur, Kazakhstan. Flight engineer Jack Fischer of NASA and Yurchikhin's arrival to the International Space Station comes the same day they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Aubrey Gemignani)

Expedition 51 prime crew members, Flight Engineer Jack Fischer of NASA, left, and Soyuz Commander Fyodor Yurchikhin of Roscosmos, second left, are seen with Expedition 51 back up crew members, Soyuz Commander Sergey Ryazanskiy of Roscosmos, second from right, and Flight Engineer Randy Bresnik of NASA, right, during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Wednesday, April 19, 2017. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

The Expedition 51 backup crew, Soyuz Commander Sergey Ryazanskiy of Roscosmos, left, and Flight Engineer Randy Bresnik of NASA, right, are photographed in front of the Soyuz MS-04 spacecraft as it arrives at the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will send Expedition 51 prime crew, Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA on a four and a half month mission aboard the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 prime crew members, Flight Engineer Jack Fischer of NASA, left, and Soyuz Commander Fyodor Yurchikhin of Roscosmos, second from left, pose for a photo with Expedition 51 back up crew members, Soyuz Commander Sergey Ryazanskiy of Roscosmos, second from right, and Flight Engineer Randy Bresnik of NASA, right, at the conclusion of the press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Wednesday, April 19, 2017. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

jsc2017e038908 (03/31/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) report to Russian state commission officials March 31 at the start of the second of two days of final qualification exams. Yurchikhin and Fischer will launch April 20 on the Soyuz MS-04 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a four and a half month mission on the International Space Station. Expedition 51 Photo: Rob Navias/NASA.

A view of the projection screens from the Tsenki Conference Hall shows live video feed of the Expedition 51 crew members gathered together on the International Space Station a few hours after the Soyuz MS-04 spacecraft docked on Thursday, April 20, 2017 in Baikonur, Kazakhstan. Pictured are Expedition 51 crew members, Soyuz Commander Fyodor Yurchikhin of Roscosmos, bottom left, and Flight Engineer Jack Fischer of NASA, bottom right. Yurchikhin and Fischer's arrival to the International Space Station comes the same day they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Aubrey Gemignani)

Expedition 51 prime crew members, Flight Engineer Jack Fischer of NASA, left, and Soyuz Commander Fyodor Yurchikhin of Roscosmos, second from left, pose for a photo with Expedition 51 back up crew members, Soyuz Commander Sergey Ryazanskiy of Roscosmos, second from right, and Flight Engineer Randy Bresnik of NASA, right, at the conclusion of the press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Wednesday, April 19, 2017. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

jsc2017e038912 (03/31/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, , Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) pose for pictures in front of a Soyuz spacecraft mockup March 31 during the second of two days of final qualification exams. Yurchikhin and Fischer will launch April 20 on the Soyuz MS-04 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a four and a half month mission on the International Space Station. Expedition 51. Photo: Rob Navias/NASA.

jsc2017e038910 (03/31/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) field questions from reporters in front of a Soyuz spacecraft mockup March 31 during the second of two days of final qualification exams. Yurchikhin and Fischer will launch April 20 on the Soyuz MS-04 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a four and a half month mission on the International Space Station. Expedition 51. Photo: Rob Navias/NASA.

Elizabeth Fischer, wife of Expedition 51 Flight Engineer Jack Fischer of NASA, reacts as she sees Fischer enter the International Space Station during a live video feed of the Expedition 51 crew members a few hours after the Soyuz MS-04 spacecraft docked on Thursday, April 20, 2017 at Tsenki Conference Hall in Baikonur, Kazakhstan. Soyuz Commander Fyodor Yurchikhin of Roscosmos and Fischer's arrival to the International Space Station comes the same day they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Aubrey Gemignani)

jsc2017e038909 (03/31/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) smiles as his crew mate, Jack Fischer of NASA (right) signs in March 31 for the second of two days of of final qualification exams. Yurchikhin and Fischer will launch April 20 on the Soyuz MS-04 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a four and a half month mission on the International Space Station. Expedition 51. Photo: Rob Navias/NASA.

jsc2017e039896 (04/05/2017) --- Aboard a Gagarin Cosmonaut Training Center aircraft, Expedition 51 crewmembers Jack Fischer of NASA (left) and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, right) display their Expedition crew patch on the wall of the cabin April 5 as they traveled to their launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch training. Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. Photo: NASA/Victor Zelentsov

jsc2017e039895 (04/05/2017) --- Aboard a Gagarin Cosmonaut Training Center aircraft, Expedition 51 crewmember Jack Fischer of NASA affixes his Expedition crew patch to the wall of the cabin April 5 as he and crewmate Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) traveled to their launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch training. Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. Photo: NASA/Victor Zelentsov

jsc2017e039774 (04/05/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) pose for pictures April 5 before departing for their launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch training. .Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft from Baikonur for a four and a half month mission on the International Space Station. Photo: NASA/Rob Navias

jsc2017e039776 (04/05/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) answer reporters’ questions April 5 before departing for their launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch training. Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft from Baikonur for a four and a half month mission on the International Space Station. Photo: NASA/Rob Navias

jsc2017e040293 (April 6, 2017) --- In the Integration Building at the Baikonur Cosmodrome in Kazakhstan, Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) pose for pictures April 6 with their Russian Sokol launch and entry suits as part of pre-launch training preparations. Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. NASA/Gagarin Cosmonaut Training Center/Andrey Shelepin

jsc2017e039897 (04/05/2017) --- Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA (right) arrive at their launch site in Baikonur, Kazakhstan April 5 for final pre-launch training after a flight from the Gagarin Cosmonaut Training Center in Star City, Russia. Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. Photo: NASA/Victor Zelentsov

jsc2017e039898 (04/05/2017) --- Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) and Jack Fischer of NASA are greeted by Russian space officials at their launch site in Baikonur, Kazakhstan April 5 after a flight from the Gagarin Cosmonaut Training Center in Star City, Russia for final pre-launch training. Fischer and Yurchikhin will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. Photo: NASA/Victor Zelentsov

jsc2017e039769 (04/05/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA (left) converses with cosmonaut Alexander Misurkin of the Russian Federal Space Agency (Roscosmos) April 5 as Fischer prepared to fly to the launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. Misurkin will launch to the International Space Station in September as part of the Expedition 53 crew. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) will launch April 20 on the Soyuz MS-04 spacecraft from Baikonur for a four and a half month mission on the International Space Station. Photo: NASA/Rob Navias

One of the gantry arms is seen before being closed around the Soyuz MS-04 spacecraft to secure the rocket, Monday, April 17, 2017 at launch pad 1 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos has his Russian Sokol suit pressure checked in preparation for launch aboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017, at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13pm April 20 Baikonur time, and will carry Yurchikhin and fellow crewmate, Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz MS-04 spacecraft is seen after the gantry arms closed around the rocket to secure it at the launch pad on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

jsc2017e040291 (April 6, 2017) --- In the Integration Building at the Baikonur Cosmodrome in Kazakhstan, Expedition 51 crewmember Jack Fischer of NASA gestures from his seat in the Soyuz MS-04 spacecraft April 6 as part of pre-launch training preparations. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. NASA/Gagarin Cosmonaut Training Center/Andrey Shelepin

Expedition 51 crew members, Soyuz Commander Fyodor Yurchikhin of Roscosmos, left, and Flight Engineer Jack Fischer of NASA, right, wave farewell to family and friends as they depart the Cosmonaut Hotel to suit-up for their Soyuz launch to the International Space Station on Thursday, April 20, 2017 in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13PM April 20 Baikonur time and will send Yurchikhin and Fischer on a four and a half month mission aboard the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz MS-04 spacecraft is rolled out to the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 50-51 crewmember Peggy Whitson of NASA flashes a smile before boarding a bus Nov. 1 to her and her crewmates to a plane to fly to their launch site in Baikonur, Kazakhstan. Whitson, Oleg Novitskiy of the Russian Federal Space Agency (Roscosmos) and Thomas Pesquet of the European Space Agency will launch Nov. 18, Baikonur time, on the Soyuz MS-03 spacecraft for a six-month mission on the International Space Station. NASA/Stephanie Stoll

Expedition 51 Flight Engineer Jack Fischer of NASA is helped into his Russian Sokol suit as he and fellow crewmate, Soyuz Commander Fyodor Yurchikhin of Roscosmos prepare for their Soyuz launch to the International Space Station, Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13pm April 20 Baikonur time, and will carry Fischer and Yurchikhin into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

jsc2017e040290 (April 6, 2017) --- In the Integration Building at the Baikonur Cosmodrome in Kazakhstan, Expedition 51 crewmember Jack Fischer of NASA eases into his seat in the Soyuz MS-04 spacecraft April 6 as part of pre-launch training preparations. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. NASA/Gagarin Cosmonaut Training Center/Andrey Shelepin

Russian security is seen as the Soyuz MS-04 spacecraft is rolled out to the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos, left, and Flight Engineer Jack Fischer of NASA, right, pose for a photo after being helped into their Russian Sokol suits in preparation for their Soyuz launch to the International Space Station, on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13 p.m. April 20 Baikonur time, and will carry Yurchikhin and Fischer into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

Expedition 51 crew members, Soyuz Commander Fyodor Yurchikhin of Roscosmos, front, and Flight Engineer Jack Fischer of NASA, back, wave farewell to family and friends as they depart the Cosmonaut Hotel to suit-up for their Soyuz launch to the International Space Station on Thursday, April 20, 2017 in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13PM April 20 Baikonur time and will send Yurchikhin and Fischer on a four and a half month mission aboard the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

jsc2017e040283 (April 6, 2017) --- In the Integration Building at the Baikonur Cosmodrome in Kazakhstan, Expedition 51 crewmember Jack Fischer of NASA checks out systems in the Soyuz MS-04 spacecraft April 6 as part of pre-launch preparations. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) will launch April 20 on the Soyuz MS-04 spacecraft for a four and a half month mission on the International Space Station. NASA/Gagarin Cosmonaut Training Center/Andrey Shelepin

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos speaks with his family after having his Russian Sokol suit pressure checked in preparation for launch onboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Yurchikhin and Flight Engineer Jack Fischer of NASA is scheduled to launch at 1:13pm Baikonur time on April 20. Photo Credit: (NASA/Aubrey Gemignani)

Dan Hartman, NASA Deputy Space Station Program Manager, speaks during the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station, Wednesday, April 19, 2017, at the Cosmonaut Hotel in Baikonur, Kazakhstan. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)
Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos is helped into his Russian Sokol suit as he and fellow crewmate, Flight Engineer Jack Fischer of NASA prepare for their Soyuz launch to the International Space Station, on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13 p.m. April 20 Baikonur time, and will carry Yurchikhin and Fischer into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

The Expedition 50-51 crew arrives at the launch site in Baikonur, Kazakhstan Nov. 1 after a flight from their training base in Star City, Russia. From left to right are Peggy Whitson of NASA, Oleg Novitskiy of the Russian Federal Space Agency (Roscosmos) and Thomas Pesquet of the European Space Agency. The three crewmembers will launch Nov. 18, Baikonur time, on the Soyuz MS-03 spacecraft for a six-month mission on the International Space Station. NASA/Alexander Vysotsky

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 50-51 crewmembers Peggy Whitson of NASA (left), Oleg Novitskiy of the Russian Federal Space Agency (Roscosmos, center, holding his daughter) and Thomas Pesquet of the European Space Agency (right) walk to a bus Nov. 1 that will take them to their plane to fly to their launch site in Baikonur, Kazakhstan. The trio will launch Nov. 18, Baikonur time, on the Soyuz MS-03 spacecraft for a six-month mission on the International Space Station. NASA/Stephanie Stoll

Expedition 51 Flight Engineer Jack Fischer of NASA, top, and Soyuz Commander Fyodor Yurchikhin of Roscosmos, bottom, speak with family after having their Russian Sokol suits pressure checked in preparation for launch onboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Fischer and Yurchikhin is scheduled to launch at 1:13pm Baikonur time on April 20. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos is helped into his Russian Sokol suit as he and fellow crewmate, Flight Engineer Jack Fischer of NASA prepare for their Soyuz launch to the International Space Station, on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13 p.m. April 20 Baikonur time, and will carry Yurchikhin and Fischer into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

The gantry arms close around the Soyuz MS-04 spacecraft to secure the rocket at the launch pad on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

The gantry arms close around the Soyuz MS-04 spacecraft to secure the rocket at the launch pad on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Flight Engineer Jack Fischer of NASA, top right, and Soyuz Commander Fyodor Yurchikhin of Roscosmos, bottom right, speak with family after having their Russian Sokol suits pressure checked in preparation for launch onboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Fischer and Yurchikhin is scheduled to launch at 1:13pm Baikonur time on April 20. Photo Credit: (NASA/Aubrey Gemignani)

At the Gagarin Cosmonaut Training Center in Star City, Russia, the Expedition 50-51 crew poses for pictures Nov. 1 in front of Lenin’s Statue before departing for their launch site in Baikonur, Kazakhstan. From left to right are Peggy Whitson of NASA, Oleg Novitskiy of the Russian Federal Space Agency (Roscosmos) and Thomas Pesquet of the European Space Agency. The trio will launch Nov. 18, Baikonur time, on the Soyuz MS-03 spacecraft for a six-month mission on the International Space Station. NASA/Stephanie Stoll

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 50-51 crewmembers Peggy Whitson of NASA (left), Oleg Novitskiy of the Russian Federal Space Agency (Roscosmos, center) and Thomas Pesquet of the European Space Agency (right) answer questions from reporters Nov. 1 before for their launch site in Baikonur, Kazakhstan. The trio will launch Nov. 18, Baikonur time, on the Soyuz MS-03 spacecraft for a six-month mission on the International Space Station. NASA/Stephanie Stoll

Expedition 51 Flight Engineer Jack Fischer of NASA speaks with his family after having his Russian Sokol suit pressure checked in preparation for launch onboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Fischer and Soyuz Commander Fyodor Yurchikhin of Roscosmos is scheduled to launch at 1:13pm Baikonur time on April 20. Photo Credit: (NASA/Aubrey Gemignani)

The Soyuz MS-04 spacecraft is rolled out to the launch pad by train on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station.Photo Credit: (NASA/Aubrey Gemignani)

In the Integration Facility at the Baikonur Cosmodrome in Kazakhstan, Expedition 50-51 crewmember Peggy Whitson of NASA undergoes a pressure test of her Sokol launch and entry suit Nov. 2 during a fit check dress rehearsal. Whitson, Oleg Novitskiy of the Russian Federal Space Agency (Roscosmos) and Thomas Pesquet of the European Space Agency will launch Nov. 18, Baikonur time, on the Soyuz MS-03 spacecraft for a six-month mission on the International Space Station. NASA/Alexander Vysotsky

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos, left, and Flight Engineer Jack Fischer of NASA, right, are seen as they depart building 254 a few hours ahead of their launch, Thursday, April 20, 2017, in Baikonur, Kazakhstan. Yurchikhin and Fischer launched in their Soyuz MS-04 spacecraft to the International Space Station to begin a four and a half month mission. Photo Credit: (NASA/Victor Zelentsov)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos is helped into his Russian Sokol suit as he and fellow crewmate, Flight Engineer Jack Fischer of NASA prepare for their Soyuz launch to the International Space Station, on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13 p.m. April 20 Baikonur time, and will carry Yurchikhin and Fischer into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos, left, is helped into his Russian Sokol suit as he and fellow crewmate, Flight Engineer Jack Fischer of NASA, right, prepare for their Soyuz launch to the International Space Station, on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13 p.m. April 20 Baikonur time, and will carry Yurchikhin and Fischer into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

Expedition 51 Flight Engineer Jack Fischer of NASA has his Russian Sokol suit pressure checked in preparation for launch aboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13 p.m. April 20 Baikonur time, and will carry Fischer and crewmate Soyuz Commander Fyodor Yurchikhin of Roscosmos into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos speaks with his family after having his Russian Sokol suit pressure checked in preparation for launch onboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Yurchikhin and Flight Engineer Jack Fischer of NASA is scheduled to launch at 1:13 p.m. Baikonur time on April 20. Photo Credit: (GCTC/Andrey Shelepin)

The Soyuz MS-04 spacecraft is seen at the Soyuz launch pad 1 just before it is raised into a vertical position Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 51 Flight Engineer Jack Fischer of NASA speaks with his family after having his Russian Sokol suit pressure checked in preparation for launch onboard the Soyuz MS-04 spacecraft on Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Fischer and Soyuz Commander Fyodor Yurchikhin of Roscosmos is scheduled to launch at 1:13 p.m. Baikonur time on April 20. Photo Credit: (GCTC/Andrey Shelepin)

At the launch site in Baikonur, Kazakhstan, Expedition 50-51 crewmember Oleg Novitskiy of the Russian Federal Space Agency (Roscosmos) is greeted by a Russian space official upon the crew’s arrival Nov. 1 following a flight from their training base in Star City, Russia. On the left is NASA’s Peggy Whitson and behind Novitskiy is Thomas Pesquet of the European Space Agency. The three crewmembers will launch Nov. 18, Baikonur time, on the Soyuz MS-03 spacecraft for a six-month mission on the International Space Station. NASA/Alexander Vysotsky

Expedition 51 Flight Engineer Jack Fischer of NASA is helped into his Russian Sokol suit as he and fellow crewmate, Soyuz Commander Fyodor Yurchikhin of Roscosmos prepare for their Soyuz launch to the International Space Station, Thursday, April 20, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for 1:13pm April 20 Baikonur time, and will carry Fischer and Yurchikhin into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (GCTC/Andrey Shelepin)

The gantry arms close around the Soyuz MS-04 spacecraft to secure the rocket at the launch pad on Monday, April 17, 2017 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for April 20 Baikonur time and will carry Expedition 51 Soyuz Commander Fyodor Yurchikhin of Roscosmos and Flight Engineer Jack Fischer of NASA into orbit to begin their four and a half month mission on the International Space Station. Photo Credit: (NASA/Aubrey Gemignani)