
Russian and American personnel work at the landing site of the Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. The Soyuz TMA-18 spacecraft landed with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko onboard. The three returned from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

ISS027-E-032650 (18 May 2011) --- Onboard the International Space Station (ISS), Russian cosmonaut Dmitry Kondratyev(right), Expedition 27 commander,and NASA astronaut Ron Garan, flight engineer, support the May 18, 2011 docking of space shuttle Endeavour and the ISS.

ISS018-E-044277 (28 March 2009) --- Astronaut Michael Fincke (foreground), Expedition 18 commander, welcomes U.S. spaceflight participant Charles Simonyi as he ingresses the International Space Station after arriving onboard a Soyuz spacecraft with two Expedition 19 crewmembers (out of frame).

ISS018-E-018995 (10 Jan. 2009) --- Astronaut Sandra Magnus, Expedition 18 flight engineer, works with the Lab-on-a-Chip Application Development-Portable Test System (LOCAD-PTS) experiment in the Destiny laboratory of the International Space Station. LOCAD-PTS is a handheld device for rapid detection of biological and chemical substances onboard the station.

ISS028-E-017434 (18 July 2011) --- The space shuttle Atlantis' cargo bay now holds the Raffaello multi-purpose logistics module, as photographed by one of the Expedition 28 crew members onboard the International Space Station before the two spacecraft undocked.

ISS025-E-005117 (24 Sept. 2010) --- The Soyuz TMA-18 spacecraft departs the International Space Station on Sept. 24, 2010. Onboard are three members of Expedition 24 ? Russian cosmonaut Alexander Skvortsov, commander; along with NASA astronaut Tracy Caldwell Dyson and Russian cosmonaut Mikhail Kornienko, both flight engineers.

ISS025-E-005039 (24 Sept. 2010) --- The Soyuz TMA-18 spacecraft departs the International Space Station on Sept. 24, 2010. Onboard are three members of Expedition 24 ? Russian cosmonaut Alexander Skvortsov, commander; along with NASA astronaut Tracy Caldwell Dyson and Russian cosmonaut Mikhail Kornienko, both flight engineers.

S127-E-006810 (18 July 2009) --- Astronaut Tim Kopra, mission specialist, is pictured during the first of five planned spacewalks to be performed on the International Space Station by the STS-127 crew. When the Endeavour crew returns to Earth, Kopra will stay onboard the station to serve as flight engineer for ISS expedition duty.

ISS028-E-017435 (18 July 2011) --- The space shuttle Atlantis' cargo bay now holds the Raffaello multi-purpose logistics module, as photographed by one of the Expedition 28 crew members onboard the International Space Station before the two spacecraft undocked.

ISS025-E-005012 (24 Sept. 2010) --- The Soyuz TMA-18 spacecraft departs the International Space Station on Sept. 24, 2010. Onboard are three members of Expedition 24 ? Russian cosmonaut Alexander Skvortsov, commander; along with NASA astronaut Tracy Caldwell Dyson and Russian cosmonaut Mikhail Kornienko, both flight engineers.

ISS025-E-005014 (24 Sept. 2010) --- The Soyuz TMA-18 spacecraft departs the International Space Station on Sept. 24, 2010. Onboard are three members of Expedition 24 ? Russian cosmonaut Alexander Skvortsov, commander; along with NASA astronaut Tracy Caldwell Dyson and Russian cosmonaut Mikhail Kornienko, both flight engineers.

American spaceflight participant Richard Garriott, left, Expedition 18 Flight Engineer Yuri V. Lonchakov and Expedition 18 Commander Michael Fincke, right, smile for the camera after they had their Russian Sokol suits pressure checked in preparation for launch onboard the Soyuz TMA-13 spacecraft, Sunday, Oct. 12, 2008 from the Baikonur Cosmodrome in Kazakhstan. The three crew members are scheduled to dock with the International Space Station on Oct. 14. Fincke and Lonchakov will spend six months on the station, while Garriott will return to Earth Oct. 24 with two of the Expedition 17 crew members currently on the International Space Station. Photo Credit: (NASA/Bill Ingalls)

S122-E-010939 (18 Feb. 2008) --- Backdropped by Earth's horizon and the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-010947 (18 Feb. 2008) --- Backdropped by Earth's horizon and the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-011112 (18 Feb. 2008) --- Backdropped by Earth's horizon and the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-009893 (18 Feb. 2008) --- Backdropped by a blue and white Earth, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-009856 (18 Feb. 2008) --- Backdropped by the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-011016 (18 Feb. 2008) --- Backdropped by the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-009880 (18 Feb. 2008) --- Backdropped by a cloud-covered part of Earth, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-011011 (18 Feb. 2008) --- Backdropped by the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-011027 (18 Feb. 2008) --- Backdropped by the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-010910 (18 Feb. 2008) --- Backdropped by a blue and white Earth, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-010982 (18 Feb. 2008) --- Backdropped by Earth's horizon and the blackness of space, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

S122-E-009900 (18 Feb. 2008) --- Backdropped by a blue and white Earth, the International Space Station is seen from Space Shuttle Atlantis as the two spacecraft begin their relative separation. Earlier the STS-122 and Expedition 16 crews concluded almost nine days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 3:24 a.m. (CST) on Feb. 18, 2008.

ISS043E019025 (03/18/2015) --- Safety training never ends onboard the International Space Station. This photo in the U.S. Laboratory on Mar. 18, 2015 was taken during Emergency Egress Drill On-Board Training (OBT) with the Expedition 43 crew. Russian cosmonaut Mikhail Kornienko (rear) and ESA (European Space Agency) astronaut Samantha Cristoforetti (middle), both flight engineers, are shown with astronaut Terry Virts, Commander (front) during the important emergency drill.

ISS011-E-09194 (19 June 2005) --- View of stowage items and the probe-and-cone docking mechanism in the hatch of the Progress 18 resupply craft, which docked to the aft port of the Zvezda Service Module of the International Space Station at 7:42 p.m. (CDT) on June 18 as the station flew approximately 225 statute miles above a point near Beijing, China. Progress delivered two tons of supplies, food, water, fuel and equipment to the Expedition 11 crewmembers onboard the station.

A large TV screen in Russian Mission Control Center in Korolev, Russia shows Cosmonaut Yury Lonchakov, right, welcoming Expedition 19 Flight Engineer Michael R. Barratt onboard the International Space Station after he fellow crew members Expedition 19 Commander Gennady I. Padalka and Spaceflight Participant Charles Simonyi docked their Soyuz TMA-14 spacecraft on Saturday, March 28, 2009. Photo Credit: (NASA/Bill Ingalls)

Michelle Barratt wishes her husband, NASA Astronaut Michael Barratt, a happy wedding anniversary via phone to the International Space Station from the Russian Mission Control Center, Korolev, Russia, Saturday, March 28, 2009. The Soyuz TMA-14 spacecraft docked to the International Space Station and delivered Expedition 19 Commander Gennady I. Padalka, Flight Engineer Michael R. Barratt and Spaceflight Participant Charles Simonyi. Photo Credit: (NASA/Bill Ingalls)

The crews of Expedition 18 and 19 are seen on a large TV screen in the Russian Mission Control Center in Korolev, Russia, Saturday, March 28, 2009 shortly after the Soyuz TMA-14 spacecraft docked to the International Space Station and delivered Expedition 19 Commander Gennady I. Padalka, Flight Engineer Michael R. Barratt and Spaceflight Participant Charles Simonyi. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 NASA Flight Engineer Tracy Caldwell Dyson, left, Expedition 23 Soyuz Commander Alexander Skvortsov and Expedition 23 Flight Engineer Mikhail Kornienko, third from left, walk out to salute Head of the Russian Federal Space Agency Anatoly Perminov, third from right, prior to their launch onboard the Soyuz TMA-18 to the International Space Station (ISS), Friday, April 2, 2010 in Baikonur, Kazakhstan. Photo Credit: (NASA/Victor Zelentsov)

Girls in traditional Kazakhstan dress await the arrival of the Soyuz TMA-18 crew at the Karaganda airport in Kazakhstan. The Soyuz TMA-18 spacecraft, carrying Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko, landed, near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

ISS011-E-09178 (18 June 2005) --- Backdropped by a blue and white Earth, an unpiloted Progress supply vehicle approaches the international space station. The Progress 18 resupply craft launched at 6:09 p.m. (CDT) on June 16, 2005 from the Baikonur Cosmodrome in Kazakhstan to deliver two tons of supplies, food, water, fuel and equipment to the Expedition 11 crewmembers onboard the station. Progress docked to the aft port of the Zvezda Service Module at 7:42 p.m. (CDT) on June 18 as the station flew approximately 225 statute miles, above a point near Beijing, China.

ISS011-E-09181 (18 June 2005) --- An unpiloted Progress supply vehicle approaches the International Space Station. The Progress 18 resupply craft launched at 6:09 p.m. (CDT) on June 16, 2005 from the Baikonur Cosmodrome in Kazakhstan to deliver two tons of supplies, food, water, fuel and equipment to the Expedition 11 crew members onboard the station. Progress docked to the aft port of the Zvezda Service Module at 7:42 p.m. (CDT) on June 18 as the station flew approximately 225 statute miles above a point near Beijing, China.

The Soyuz TMA-18 spacecraft is seen as it lands with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-19M spacecraft is seen as it lands with Expedition 47 crew members Tim Kopra of NASA, Tim Peake of the European Space Agency, and Yuri Malenchenko of Roscosmos near the town of Zhezkazgan, Kazakhstan on Saturday, June 18, 2016. Kopra, Peake, and Malenchenko are returning after six months in space where they served as members of the Expedition 46 and 47 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 47 astronaut Tim Kopra of NASA, center, arrives at the Karaganda Airport in Kazakhstan a few hours after he, Yuri Malenchenko of Roscosmos, and Tim Peake of the European Space Agency landed in their Soyuz TMA-19M spacecraft near the town of Zhezkazgan, Kazakhstan on Saturday, June 18, 2016. Kopra, Peake, and Malenchenko are returning after six months in space where they served as members of the Expedition 46 and 47 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-18 spacecraft is seen as it lands with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Mikhail Kornienko is helped out of the Soyuz TMA-18 spacecraft shortly after landing with fellow crew members Commander Alexander Skvortsov and Tracy Caldwell Dyson near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Mikhail Kornienko is carried to the medical tent shortly after landing in the Soyuz TMA-18 spacecraft with fellow crew members Commander Alexander Skvortsov and Tracy Caldwell Dyson near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-18 spacecraft is seen as it lands with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Russian support personnel roll the Soyuz TMA-19M spacecraft after it landed with Expedition 47 crew members Tim Kopra of NASA, Tim Peake of the European Space Agency, and Yuri Malenchenko of Roscosmos near the town of Zhezkazgan, Kazakhstan on Saturday, June 18, 2016. Kopra, Peake, and Malenchenko are returning after six months in space where they served as members of the Expedition 46 and 47 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

NASA, ESA, Roscosmos, and Russian Search and Recovery Forces meet at the Cosmonaut Hotel in Karaganda, Kazakhstan to discuss the readiness for the landing of Expedition 57 crew members Serena Auñón-Chancellor of NASA, Alexander Gerst of ESA (European Space Agency), and Sergey Prokopyev of Roscosmos, Tuesday, Dec. 18, 2018. Auñón-Chancellor, Gerst, and Prokopyev are returning after 197 days in space where they served as members of the Expedition 56 and 57 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Russian search and rescue helicopters refuel in Arkalyk, Kazakhstan prior to the landing of the Soyuz TMA-18 spacecraft with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-19M spacecraft is seen as it lands with Expedition 47 crew members Tim Kopra of NASA, Tim Peake of the European Space Agency, and Yuri Malenchenko of Roscosmos near the town of Zhezkazgan, Kazakhstan on Saturday, June 18, 2016. Kopra, Peake, and Malenchenko are returning after six months in space where they served as members of the Expedition 46 and 47 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

A large TV screen in Russian Mission Control Center in Korolev, Russia shows Expedition 23 Commander Oleg Kotov, right, welcoming NASA astronaut and Flight Engineer Tracy Caldwell Dyson onboard the International Space Station after she and fellow crew members Expedition 23 Soyuz Commander Alexander Skvortsov and Flight Engineer Mikhail Kornienko docked their Soyuz TMA-18 spacecraft on Sunday, April 4, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 24 Flight Engineer Tracy Caldwell Dyson exits the helicopter after her flight from the Soyuz TMA-18 spacecraft landing site near Arkalyk, Kazakhstan to Karaganda, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson returned from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Tracy Caldwell Dyson talks to her husband on a satellite phone shortly after landing in the Soyuz TMA-18 spacecraft with fellow crew members Commander Alexander Skvortsov and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Head of Russian Air Force Operational Group Golovatyuk Oleg Alekseevich delivers his report during a meeting to discuss the readiness for the landing of Expedition 57 crew members Serena Auñón-Chancellor of NASA, Alexander Gerst of ESA (European Space Agency), and Sergey Prokopyev of Roscosmos, Tuesday, Dec. 18, 2018. Auñón-Chancellor, Gerst, and Prokopyev are returning after 197 days in space where they served as members of the Expedition 56 and 57 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

European Space Agency astronaut Pedro Duque of Spain, left, Expedition 8 Commander Michael Foale and Expedition 8 Soyuz Commander and Flight Engineer Alexander Kaleri gather on a bus following their arrival in Baikonur, Kazakhstan, Sunday, Oct. 12, 2003, in preparation for their Oct. 18 launch from the Baikonur Cosmodrome onboard a Soyuz rocket to the International Space Station. Photo Credit (NASA/Bill Ingalls)

The Soyuz TMA-18 spacecraft, with it's crew of three still inside, is seen just moments after landing with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Russian search and rescue personnel and engineers prepare to extract the crew from the Soyuz TMA-18 moments after it landed with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Commander Alexander Skvortsov is carried to the medical tent shortly after landing in the Soyuz TMA-18 spacecraft with fellow crew members Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Russian search and rescue teams arrive at the landing site seconds after the Soyuz TMA-18 spacecraft touched down with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

NASA, ESA, Roscosmos, and Russian Search and Recovery Forces meet at the Cosmonaut Hotel in Karaganda, Kazakhstan to discuss the readiness for the landing of Expedition 57 crew members Serena Auñón-Chancellor of NASA, Alexander Gerst of ESA (European Space Agency), and Sergey Prokopyev of Roscosmos, Tuesday, Dec. 18, 2018. Auñón-Chancellor, Gerst, and Prokopyev are returning after 197 days in space where they served as members of the Expedition 56 and 57 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Tracy Caldwell Dyson is helped out of the Soyuz TMA-18 spacecraft shortly after landing with fellow crew members Commander Alexander Skvortsov and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Russian search and rescue teams arrive at the landing site seconds after the Soyuz TMA-18 spacecraft touched down with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Russian search and rescue personnel and engineers prepare to extract the crew from the Soyuz TMA-18 moments after it landed with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-18 spacecraft is seen as it lands with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Tracy Caldwell Dyson is helped out of the Soyuz TMA-18 spacecraft shortly after landing with fellow crew members Commander Alexander Skvortsov and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Tracy Caldwell Dyson signs the inside of the Russian helicopter that took her from the Soyuz TMA-18 spacecraft landing site near Arkalyk, Kazakhstan to Karaganda, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson returned from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-18 spacecraft is seen as it lands with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

NASA, ESA, Roscosmos, and Russian Search and Recovery Forces meet at the Cosmonaut Hotel in Karaganda, Kazakhstan to discuss the readiness for the landing of Expedition 57 crew members Serena Auñón-Chancellor of NASA, Alexander Gerst of ESA (European Space Agency), and Sergey Prokopyev of Roscosmos, Tuesday, Dec. 18, 2018. Auñón-Chancellor, Gerst, and Prokopyev are returning after 197 days in space where they served as members of the Expedition 56 and 57 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

JSC2003-E-59057 (13 October 2003) --- Astronaut C. Michael Foale (left), Expedition 8 mission commander and NASA ISS science officer, is briefed by a technician inside the Soyuz TMA-3 vehicle in a processing facility at the Baikonur Cosmodrome in Kazakhstan during a pre-launch inspection of the spacecraft. Expedition 8 is scheduled to launch from the Baikonur Cosmodrome on October 18 onboard a Soyuz rocket to the International Space Station (ISS). Photo Credit: NASA/Bill Ingalls

Russian support personnel work around the Soyuz TMA-19M spacecraft after it landed with Expedition 47 crew members Tim Kopra of NASA, Tim Peake of the European Space Agency, and Yuri Malenchenko of Roscosmos near the town of Zhezkazgan, Kazakhstan on Saturday, June 18, 2016. Kopra, Peake, and Malenchenko are returning after six months in space where they served as members of the Expedition 46 and 47 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Commander Alexander Skvortsov celebrates as he is helped out of the Soyuz TMA-18 spacecraft shortly after landing with fellow crew members Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Commander Alexander Skvortsov laughs after being given fresh fruit and vegetables shortly after landing in the Soyuz TMA-18 spacecraft with fellow crew members Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-18 spacecraft is seen as it lands with Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Mikhail Kornienko, embraces his family after he and Expedition 24 Commander Alexander Skvortsov arrived at Chkalovskaya airport just outside Moscow on Saturday, Sept. 25, 2010. Skvortsov, Kornienko and Expedition 24 Flight Engineer Tracy Caldwell Dyson, landed in their Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Commander Alexander Skvortsov, embraces his family after he and Expedition 24 Flight Engineer Mikhail Kornienko arrived at Chkalovskaya airport just outside Moscow on Saturday, Sept. 25, 2010. Skvortsov, Kornienko and Expedition 24 Flight Engineer Tracy Caldwell Dyson, landed in their Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

ISS009-E-29078 (18 October 2004) --- The crewmembers onboard the International Space Station (ISS) gather for a group portrait in the Destiny laboratory. From the left (front row) are cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia's Federal Space Agency, and astronaut Edward M. (Mike) Fincke, Expedition 9 NASA ISS science officer and flight engineer. From the left (back row) are Russian Space Forces cosmonaut Yuri Shargin; astronaut Leroy Chiao, Expedition 10 commander and NASA ISS science officer; and cosmonaut Salizhan S. Sharipov, Expedition 10 flight engineer representing Russia's Federal Space Agency.

Expedition 24 Flight Engineer Mikhail Kornienko, foreground, and Expedition 24 Commander Alexander Skvortsov embrace their family and friends after their arrival at Chkalovskaya airport just outside Moscow on Saturday, Sept. 25, 2010. Skvortsov, Kornienko and Expedition 24 Flight Engineer Tracy Caldwell Dyson, landed in their Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

ISS009-E-29079 (18 October 2004) --- The crewmembers onboard the International Space Station (ISS) gather for a group portrait in the Destiny laboratory. From the left (front row) are cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia's Federal Space Agency, and astronaut Edward M. (Mike) Fincke, Expedition 9 NASA ISS science officer and flight engineer. From the left (back row) are Russian Space Forces cosmonaut Yuri Shargin; astronaut Leroy Chiao, Expedition 10 commander and NASA ISS science officer; and cosmonaut Salizhan S. Sharipov, Expedition 10 flight engineer representing Russia's Federal Space Agency.

ISS020-E-022321 (18 July 2009) --- On the second day of joint activities between the STS-127 astronauts and ISS Expedition 20 crew members, Canadian Space Agency astronaut Julie Payette and Japanese Aerospace Exploration Agency astronaut Koichi Wakata are pictured onboard the orbital outpost. They are among 11 astronauts and cosmonauts who remained inside the shuttle and station to provide support while two crew members performed the first spacewalk to continue work on the station. Wakata has been serving as a flight engineer onboard ISS, but converts to an STS-127 missison specialist until returning home aboard Endeavour later this month.

ISS022-E-030482 (18 Jan. 2010) --? An Expedition 22 crew member onboard the International Space Station took this image of the 260 year old city, Port-au-Prince on Jan. 18, 2010 when they could view the area. This was a few days after the major Haitian earthquake occurred and brought devastation to Port-au-Prince, Carrefour, and the surrounding region. The Toussaint Louverture International Airport, clearly visible on the north side of Port-au-Prince, is the central focal point of incoming international aid. The population of Port-au-Prince is estimated to be between 2.5 to 3 million people. The photo was taken with an 800 mm lens setting.

Soyuz Commander and Expedition 14 Flight Engineer Mikhail Tyurin receives a blessing at the Cosmonaut Hotel the morning of his launch onboard the Soyuz TMA-9 spacecraft, Monday, Sept. 18, 2006, in Baikonur, Kazakhstan. The Soyuz TMA-9 spacecraft launched from the Baikonur Cosmodrome in carrying Expedition 14 Commander Michael Lopez-Alegria, Soyuz Commander and Expedition 14 Flight Engineer Mikhail Tyurin and American spaceflight participant Anousheh Ansari to the International Space Station. Anousheh Ansari will spend nine days on the station under a commercial agreement with the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Mikhail Kornienko, left, and Commander Alexander Skvortsov, shake hands with Russian dignitaries after their arrival at Chkalovskaya airport just outside Moscow on Saturday, Sept. 25, 2010. Skvortsov, Kornienko and Expedition 24 Flight Engineer Tracy Caldwell Dyson, landed in their Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 14 Commander Michael Lopez-Alegria receives a blessing at the Cosmonaut Hotel the morning of his launch onboard the Soyuz TMA-9 spacecraft, Monday, Sept. 18, 2006 in Baikonur, Kazakhstan. The Soyuz TMA-9 spacecraft launched from the Baikonur Cosmodrome carrying Expedition 14 Commander Michael Lopez-Alegria, Soyuz Commander and Expedition 14 Flight Engineer Mikhail Tyurin and American spaceflight participant Anousheh Ansari, who will spend nine days on the International Space Station under a commercial agreement with the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

NASA International Space Station Operations Integration Manager Kenny Todd thanks Russian Search and Rescue teams for their amazing support during the October 11, 2018 aborted Expedition 57 launch, Tuesday, Dec. 18, 2018 at the Cosmonaut Hotel in Karaganda, Kazakhstan. NASA, ESA, and Roscosmos teams were gathered to discuss the readiness for the landing of Expedition 57 crew members Serena Auñón-Chancellor of NASA, Alexander Gerst of ESA (European Space Agency), and Sergey Prokopyev of Roscosmos, Auñón-Chancellor, Gerst, and Prokopyev are returning after 197 days in space where they served as members of the Expedition 56 and 57 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Flight Engineer Mikhail Kornienko answer reporters questions in traditional Kazakh dress during a post flight ceremony and press conference at the Karaganda airport in Kazakhstan on Saturday, Sept. 25, 2010. The Soyuz TMA-18 spacecraft, carrying Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Kornienko, landed, near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 14 Commander Michael Lopez-Alegria signs the door of a hotel room at the Cosmonaut Hotel the morning of his launch onboard the Soyuz TMA-9 spacecraft, Monday, Sept. 18, 2006, in Baikonur, Kazakhstan. The Soyuz TMA-9 spacecraft launched from the Baikonur Cosmodrome in carrying Expedition 14 Commander Michael Lopez-Alegria, Soyuz Commander and Expedition 14 Flight Engineer Mikhail Tyurin and American spaceflight participant Anousheh Ansari to the International Space Station. Anousheh Ansari will spend nine days on the station under a commercial agreement with the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Commander Alexander Skvortsov, front left, and Flight Engineer Mikhail Kornienko, back left, are helped down the stairs of an airplane after their arrival at Chkalovskaya airport just outside Moscow on Saturday, Sept. 25, 2010. Skvortsov, Kornienko and Expedition 24 Flight Engineer Tracy Caldwell Dyson, landed in their Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 Commander Alexander Skvortsov answer reporters questions in traditional Kazakh dress during a post flight ceremony and press conference at the Karaganda airport in Kazakhstan on Saturday, Sept. 25, 2010. The Soyuz TMA-18 spacecraft, carrying Expedition 24 Commander Alexander Skvortsov and Flight Engineers Tracy Caldwell Dyson and Mikhail Kornienko, landed, near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Soyuz Commander and Expedition 14 Flight Engineer Mikhail Tyurin signs the door of a hotel room at the Cosmonaut Hotel the morning of his launch onboard the Soyuz TMA-9 spacecraft, Monday, Sept. 18, 2006, in Baikonur, Kazakhstan. The Soyuz TMA-9 spacecraft launched from the Baikonur Cosmodrome carrying Expedition 14 Commander Michael Lopez-Alegria, Soyuz Commander and Expedition 14 Flight Engineer Mikhail Tyurin and American spaceflight participant Anousheh Ansari to the International Space Station. Anousheh Ansari will spend nine days on the station under a commercial agreement with the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

S119-E-008343 (25 March 2009) --- Backdropped by the blackness of space and Earth’s horizon, the International Space Station is seen from Space Shuttle Discovery as the two spacecraft begin their relative separation. Earlier the STS-119 and Expedition 18 crews concluded 9 days, 20 hours and 10 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 2:53 p.m. (CDT) on March 25, 2009.

S119-E-008220 (25 March 2009) --- Backdropped by the blackness of space, the International Space Station is seen from Space Shuttle Discovery as the two spacecraft begin their relative separation. Earlier the STS-119 and Expedition 18 crews concluded 9 days, 20 hours and 10 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 2:53 p.m. (CDT) on March 25, 2009.

S126-E-014882 (28 Nov. 2008) --- Backdropped by a cloud-covered part of Earth, the International Space Station is seen from Space Shuttle Endeavour as the two spacecraft begin their relative separation. Earlier the STS-126 and Expedition 18 crews concluded 11 days, 16 hours and 46 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 8:47 a.m. (CST) on Nov. 28, 2008.

S126-E-014906 (28 Nov. 2008) --- Backdropped by a cloud-covered part of Earth, the International Space Station is seen from Space Shuttle Endeavour as the two spacecraft begin their relative separation. Earlier the STS-126 and Expedition 18 crews concluded 11 days, 16 hours and 46 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 8:47 a.m. (CST) on Nov. 28, 2008.

ISS020-E-031558 (18 Aug. 2009) --- NASA astronaut Michael Barratt, Expedition 20 flight engineer, conducts a Surface, Water and Air Biocharacterization (SWAB) water sampling from the Potable Water Dispenser (PWD) in the Destiny laboratory of the International Space Station. SWAB uses advanced molecular techniques to comprehensively evaluate microbes onboard the space station, including pathogens (organisms that may cause disease). This study will allow an assessment of the risk of microbes to the crew and the spacecraft.

S119-E-010247 (25 March 2009) --- Backdropped by a blue and white Earth, the International Space Station is seen from Space Shuttle Discovery as the two spacecraft begin their relative separation. Earlier the STS-119 and Expedition 18 crews concluded 9 days, 20 hours and 10 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 2:53 p.m. (CDT) on March 25, 2009.

NASA astronaut Suni Williams is helped out of a SpaceX Dragon spacecraft onboard the SpaceX recovery ship MEGAN after she, NASA astronaut Nick Hague, and Butch Wilmore, and Roscosmos cosmonaut Aleksandr Gorbunov landed in the water off the coast of Tallahassee, Florida, Tuesday, March 18, 2025. Hague, Gorbunov, Williams, and Wilmore are returning from a long-duration science expedition aboard the International Space Station. Photo Credit: (NASA/Keegan Barber)

Roscosmos cosmonaut Aleksandr Gorbunov is helped out of a SpaceX Dragon spacecraft onboard the SpaceX recovery ship MEGAN after he, NASA astronauts Nick Hague, Suni Williams, and Butch Wilmore, landed in the water off the coast of Tallahassee, Florida, Tuesday, March 18, 2025. Hague, Gorbunov, Williams, and Wilmore are returning from a long-duration science expedition aboard the International Space Station. Photo Credit: (NASA/Keegan Barber)

ISS017-E-019022 (14 Oct. 2008) --- Russian Federal Space Agency cosmonaut Yury Lonchakov, Expedition 18 flight engineer, ingresses the Earth-facing port of the International Space Station's Zarya module after arriving onboard the Soyuz TMA-13 spacecraft with NASA astronaut Michael Fincke, commander, and American spaceflight participant Richard Garriott (both out of frame). Hatches between the two spacecraft were opened at 4:55 a.m. (CDT).

Mary Ellen Caldwell, center, speaks to her daughter NASA Flight Engineer Tracy Caldwell Dyson onboard the International Space Station from the Russian Mission Control Center, Korolev, Russia, Sunday, April 4, 2010. The Soyuz TMA-18 docked to the International Space Station carrying Expedition 23 Soyuz Commander Alexander Skvortsov, Flight Engineer Mikhail Kornienko and NASA Flight Engineer Tracy Caldwell Dyson. Photo Credit: (NASA/Carla Cioffi)

S119-E-010324 (25 March 2009) --- Backdropped by the blackness of space and Earth?s horizon, the International Space Station is seen from Space Shuttle Discovery as the two spacecraft begin their relative separation. Earlier the STS-119 and Expedition 18 crews concluded 9 days, 20 hours and 10 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 2:53 p.m. (CDT) on March 25, 2009.

S127-E-006833 (18 July 2009) --- Astronaut Tim Kopra, mission specialist, is pictured at the edge of Endeavour's cargo bay during the first of five planned spacewalks to be performed on the International Space Station by the STS-127 crew. When the Endeavour crew returns to Earth, Kopra will stay onboard the space station to serve as flight engineer for ISS expedition duty.

S119-E-008230 (25 March 2009) --- Backdropped by the blackness of space, the International Space Station is seen from Space Shuttle Discovery as the two spacecraft begin their relative separation. Earlier the STS-119 and Expedition 18 crews concluded 9 days, 20 hours and 10 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 2:53 p.m. (CDT) on March 25, 2009.

S126-E-014823 (28 Nov. 2008) --- Backdropped by a cloud-covered part of Earth, the International Space Station is seen from Space Shuttle Endeavour as the two spacecraft begin their relative separation. Earlier the STS-126 and Expedition 18 crews concluded 11 days, 16 hours and 46 minutes of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 8:47 a.m. (CST) on Nov. 28, 2008.

Tim Kopra of NASA talks on a satellite phone outside the Soyuz TMA-19M spacecraft just minutes after he and Yuri Malenchenko of Roscosmos and Tim Peake of the European Space Agency landed in a remote area near the town of Zhezkazgan, Kazakhstan on Saturday, June 18, 2016. Kopra, Peake, and Malenchenko are returning after six months in space where they served as members of the Expedition 46 and 47 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

ISS007-E-12915 (18 August 2003) --- This view featuring Egypt’s Great pyramids of Giza (right center) was taken by an Expedition 7 crewmember onboard the International Space Station (ISS). Giza is a royal burial place, commissioned and built by pharaohs during the fourth dynasty around 2550 BC. Today, Giza is a rapidly growing region of Cairo. Population growth in Egypt continues to soar, leading to new construction. New roads for large new developments are obvious in the desert hills northwest and southwest of the pyramids.

George Dyson, right, speaks to his wife NASA Flight Engineer Tracy Caldwell Dyson onboard the International Space Station from the Russian Mission Control Center, Korolev, Russia, Sunday, April 4, 2010. The Soyuz TMA-18 docked to the International Space Station carrying Expedition 23 Soyuz Commander Alexander Skvortsov, Flight Engineer Mikhail Kornienko and NASA Flight Engineer Tracy Caldwell Dyson. Photo Credit: (NASA/Carla Cioffi)