U.S. Ambassador to Russia Jon Huntsman Jr., right, is seen during an interview with NASA Public Affairs Officer Rob Navias, left, in the Moscow Mission Control Center in Korolev, Russia after the Soyuz MS-07 spacecraft docked with the International Space Station, Tuesday, Dec. 19, 2017. Photo Credit: (NASA/Joel Kowsky)

JSC2000-E-22723 (10 September 2000) --- Rob Navias, at the Public Affairs Officer (PAO) console in Houston's Mission Control Center, describes the docking of the Space Shuttle Atlantis and the International Space Station (ISS).

JSC2011-E-065977 (10 July 2011) --- STS-135 lead flight director Kwatsi Alibaruho (right) and Public Affairs Office moderator Rob Navias are pictured during a flight day three mission status briefing at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-047750 (23 May 2011) --- Public Affairs Office (PAO) mission commentator Rob Navias is pictured at his console in the space station flight control room in the Mission Control Center at NASA's Johnson Space Center during STS-134 flight day eight activities. Photo credit: NASA

JSC2002-E-41241 (9 October 2002) --- Rob Navias, Public Affairs Office (PAO) commentator, is pictured at his console in the shuttle flight control room (WFCR) in Houston’s Mission Control Center (MCC) during the STS-112 mission.

JSC2011-E-060718 (30 June 2011) --- STS-135 flight directors Kwatsi Alibaruho (center) and Chris Edelen along with Public Affairs Office moderator Rob Navias (left) are pictured during a mission overview press conference at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-065999 (10 July 2011) --- STS-135 lead flight director Kwatsi Alibaruho (right) and Public Affairs Office moderator Rob Navias are pictured during a flight day three mission status briefing at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-065983 (10 July 2011) --- STS-135 lead flight director Kwatsi Alibaruho (right) and Public Affairs Office moderator Rob Navias are pictured during a flight day three mission status briefing at NASA's Johnson Space Center. Photo credit: NASA

JSC2005-E-30656 (28 July 2005) --- Rob Navias, Public Affairs Office commentator, describes the activities of a very busy third flight day for STS-114 from the PAO console in the Space Shuttle (White) Flight Control Room.

U.S. Ambassador to Russia Jon Huntsman Jr. is seen during an interview with NASA Public Affairs Office Rob Navias in the Moscow Mission Control Center in Korolev, Russia after the Soyuz MS-07 spacecraft docked with the International Space Station, Tuesday, Dec. 19, 2017. Photo Credit: (NASA/Joel Kowsky)

Members of the media are seen during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

JSC2001-E-21337 (12 July 2001) --- Rob Navias (right), at the Public Affairs Officer (PAO) console in Houston's Mission Control Center (MCC), awaits to do his commentary as he views the firing of Space Shuttle Atlantis' main engines on his monitor just seconds before launch and the beginning of the STS-104 mission. Daniel K. Carpenter, director of the Public Affairs Office, looks on.

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

jsc2017e038548 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star city, Russia, Expedition 51 crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) strikes a reflective pose March 30 as he prepares to enter a Russian segment systems simulator as part of final crew qualification exams. Yurchikhin and Jack Fischer of NASA 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. Credit: NASA/Rob Navias

jsc2017e039459 (04/03/2017) --- At the Kremlin Wall in Red Square in Moscow, Expedition 51 crewmember Jack Fischer of NASA lays flowers at the site where Russian space icons are interred during traditional ceremonies April 3. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) 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. Photo: NASA/Rob Navias.

jsc2017e039446 (04/03/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA answers a reporter’s question April 3 during a traditional news conference. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) 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. Photo: NASA/Rob Navias.

jsc2017e038546 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left) applauds as his crewmate, Jack Fischer of NASA (right) signs in March 30 for the start of final crew qualification exams. They 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. Credit: NASA/Rob Navias

jsc2017e039450 (04/03/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, right) answers a reporter’s question April 3 during a traditional news conference. On Yurchikhin’s right is crewmate Jack Fischer of NASA. They 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. Photo: NASA/Rob Navias

JSC2001-E-25518 (22 August 2001) --- Rob Navias (left), Public Affairs Officer (PAO), and Dan Carpenter, director of the Public Affairs Office, are photographed at their consoles in the shuttle flight control room (WFCR) in Houston’s Mission Control Center (MCC). At the time this photo was taken the Space Shuttle Discovery was about to land at Kennedy Space Center, Florida, to mark the end of a successful mission to the International Space Station (ISS).

JSC2008-E-010333 (7 Feb. 2008) --- Public Affairs Office commentator Rob Navias watches the large screens in the space shuttle flight control room of Johnson Space Center's Mission Control Center (MCC) during launch countdown activities a few hundred miles away in Florida, site of Space Shuttle Atlantis' scheduled STS-122 launch. Liftoff occurred at 2:45 p.m. (EST) on Feb. 7, 2008 from launch pad 39A at Kennedy Space Center.

jsc2017e039448 (04/03/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, right) answers a reporter’s question April 3 during a traditional news conference. On Yurchikhin’s right is crewmate Jack Fischer of NASA. They 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. Photo: NASA/Rob Navias

jsc2017e039461 (o4/03/2017) --- With St. Basil’s Cathedral providing the backdrop at Red Square in Moscow, Expedition 51 crewmember Jack Fischer of NASA and his wife, Elizabeth, pose for pictures April 3 after a traditional ceremonial visit. Fischer and his crewmate, Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) 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. Photo: NASA/Rob Navias

jsc2017e039460 (04/03/2017) --- At the Kremlin Wall in Red Square in Moscow. Expedition 51 crewmember Jack Fischer of NASA lays flowers at the site where Russian space icons are interred during traditional ceremonies April 3. Looking on is his crewmate, Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, left)). They 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. Photo: NASA/Rob Navias

jsc2017e038547 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmembers Jack Fischer of NASA (left) and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, right) flash broad smiles March 30 as they begin final crew qualification exams. They 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. Credit: NASA/Rob Navias

jsc2017e039458 (04/03/2017) --- At the Kremlin Wall in Red Square in Moscow, Expedition 51 crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) lays flowers at the site where Russian space icons are interred during traditional ceremonies April 3. Yurchikhin and Jack Fischer of NASA 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. Photo: NASA/Rob Navias.

jsc2017e039457 (04/03/2017) --- Walking in a driving rainstorm, Expedition 51 crewmember Jack Fischer of NASA (right) and his wife Elizabeth make their way along the Kremlin Wall in Red Square in Moscow April 3 to lay flowers where Russian space icons are interred. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) 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 Photo: .NASA/Rob Navias.

jsc2017e039456 (04/03/2017) --- Walking in a driving rainstorm, Expedition 51 crewmember Jack Fischer of NASA (right) and his wife Elizabeth make their way to the Kremlin Wall in Red Square in Moscow April 3 to lay flowers where Russian space icons are interred. Fischer and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) 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. Photo: NASA/Rob Navias

Expedition 26 Commander Scott Kelly (left) is reunited with his twin brother, Mark Kelly on March 17, 2010, following a flight back to Ellington Field, Houston from Kustanai, Kazakhstan. Scott Kelly landed in Kazakhstan on March 16 with his Russian crewmates in the Soyuz TMA-01M spacecraft after 159 days in space, 157 days on the International Space Station. Mark Kelly is in the final weeks of training as Commander of the final flight of Endeavour, STS-134, that will spend more than a week docked to the ISS. Endeavour is targeted for launch on April 19. Credit: NASA/Rob Navias

jsc2017e038543 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 backup crewmember Randy Bresnik of NASA (right) signs in for the start of final crew qualification exams March 30 as his crewmate, Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos, left) looks on. They are backups to Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA, who 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. Credit: NASA/Rob Navias

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.

jsc2017e038541 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 backup crewmembers Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos, left) and Randy Bresnik of NASA (right) report to State Commission officials March 30 for the start of two days of final crew qualification exams. They are backups to Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA, who 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. Credit: NASA/Rob Navias

jsc2017e039770 (04/05/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA (left) poses for pictures with his backup, Randy Bresnik of NASA April 5 as they prepared to fly to the launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. 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

jsc2017e039773 (04/05/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, the statue of Vladimir Lenin serves as a backdrop as 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.

jsc2017e038549 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, trainers keep tabs on the work of Expedition 51 crewmembers Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) and Jack Fischer of NASA through a bank of video monitors and data displays March 30 as the crew conducted the first 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. Credit: NASA/Rob Navias

jsc2017e039452 (04/03/2017) --- At the Gagarin Museum at the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 prime crewmember Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, front row, left) signs a commemorative book in a traditional ceremony April 3. Looking on are his crewmate, Jack Fischer of NASA (front row, right) and the backup crewmembers in the back row, Sergey Ryazanskiy of Roscosmos (back row, left) and Randy Bresnik of NASA (back row, right). 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. Photo: NASA/Rob Navias.

jsc2017e038543 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 backup crewmembers Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos, left) and Randy Bresnik of NASA (right) pose for pictures in front of a Soyuz training mockup March 30 at the start of final crew qualification exams. They are backups to Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA, who 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. Credit: NASA/Rob Navias

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

jsc2017e039772 (04/05/2017) ---- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA (right) walks to a waiting bus April 5 with his crewmate, Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, center) and Yurchikhin’s wife as they prepared to fly to the launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. 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

jsc2017e039775 (04/05/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, the Expedition 51 prime and backup crewmembers pose for pictures April 5 before flying to their launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. From left to right are backup crewmembers Randy Bresnik of NASA and Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos) and prime crewmembers Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA. 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

jsc2017e039768 (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) share a light moment April 5 as they prepared to fly to the launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. 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

JSC2011-E-060800 (30 June 2011) --- The STS-135 crew meets with the Johnson Space Center public affairs team before the crew's media briefing at NASA?s Johnson Space Center in Houston on June 30, 2011. The press conference provided the last scheduled opportunity for a large group of press to speak with the crew before the final launch on July 8. Shown, from left, are Rob Navias and James Hartsfield of public affairs, and NASA astronauts Sandy Magnus, Rex Walheim, Chris Ferguson and Doug Hurley. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

jsc2017e039767 (04/05?2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA (left) exchanges morning greetings with his backup, Randy Bresnik of NASA April 5 as they prepared to fly to the launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. 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

jsc2017e039453 (04/03/2017) --- At the Gagarin Museum at the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA (front row, right) signs a commemorative book in a traditional ceremony April 3. Looking on are crewmate Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, front row, left) and in the back row, backup crewmembers Sergey Ryazanskiy of Roscosmos (back row, left) and Randy Bresnik of NASA (back row, right). Fischer and Yurchikhin 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. Photo: NASA/Rob Navias

jsc2017e038550 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA is seen inside a Russian segment systems mockup on a TV monitor being viewed by trainers March 30 as he and Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos) began two days of final qualification exams. Fischer and Yurchikhin 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. Credit: NASA/Rob Navias

jsc2017e039771 (04/05/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA (second from the right) poses for pictures with his crewmate, Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos, second from the left) and Yurchikhin’s wife April 5 as they prepared to fly to the launch site at the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. 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. Photp: NASA/Rob Navias

jsc2017e038545 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 backup crewmember Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos) waits to board a Soyuz training mockup March 30 as his crewmate, Randy Bresnik of NASA, works inside as part of final crew qualification exams. They are backups to Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA, who 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. Credit: NASA/Rob Navias

U.S. Ambassador to Russia Jon Huntsman Jr. is interviewed by NASA Public Affairs Officer Rob Navias after the completion of the State Commission meeting to approve the Soyuz launch of Expedition 56 to the International Space Station, Tuesday, June 5, 2018 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 56 Soyuz Commander Sergey Prokopyev of Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA (European Space Agency) are scheduled to launch to the International Space Station aboard the Soyuz MS-09 spacecraft on Wednesday, June 6. Photo Credit: (NASA/Joel Kowsky)

jsc2017e039445 (04/03/2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 crewmember Jack Fischer of NASA displays a medal derived from the Apollo-Soyuz crew patch during a news conference April 3 to demonstrate how the U.S. and Russia are continuing their cooperation in space exploration. To Fischer’s left is crewmate Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos). They 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. Photo: NASA/Rob Navias.

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.

U.S. Ambassador to Russia Jon Huntsman Jr. is interviewed by NASA Public Affairs Officer Rob Navias after the completion of the State Commission meeting to approve the Soyuz launch of Expedition 56 to the International Space Station, Tuesday, June 5, 2018 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 56 Soyuz Commander Sergey Prokopyev of Roscosmos, Serena Auñón-Chancellor of NASA, and Alexander Gerst of ESA (European Space Agency) are scheduled to launch to the International Space Station aboard the Soyuz MS-09 spacecraft on Wednesday, June 6. Photo Credit: (NASA/Joel Kowsky)

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.

jsc2017e038542 (March 30, 2017) --- At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 51 backup crewmember Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos, left) signs in for the start of final crew qualification exams March 30 as his crewmate, Randy Bresnik of NASA (right) looks on. They are backups to Fyodor Yurchikhin of Roscosmos and Jack Fischer of NASA, who 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. Credit: NASA/Rob Navias