S93-40675 (6 Aug 1993) --- Cosmonaut Sergei Krikalev.

Seated in the rear station of a NASA T-38 jet trainer aircraft, Russian Cosmonaut Sergei Krikalev prepares to take a familiarization flight.

Cosmonaut Sergei Krikalev, STS-60 mission specialist, practices operating the Shuttle's Remote Manipulator System (RMS) during a training exercise at JSC's Shuttle mockup and integration laboratory.

Roscosmos Director of Human Spaceflight Programs Sergei Krikalev listens to reporter's questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

JSC2005-E-13488 (March 2005) --- Cosmonaut Sergei Krikalev, Russia's Federal Space Agency, Expedition 11 commander, Soyuz commander.

Sergei Krikalev, head of the Gagarin Cosmonaut Training Center, speaks at the State Commission meeting held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Tuesday, Dec. 14, 2010. Photo Credit: (NASA/Carla Cioffi)

Sergei Krikalev, Director of the Gagarin Cosmonaut Training Center, answers a reporter's question, Monday, April 23, 2012 in Star City, Russia. Krikalev is joined by Oleg Kotov, Deputy Director, GCTC. Photo Credit: (NASA/Carla Cioffi)

Expedition 11 cosmonaut Sergei Krikalev smiles after landing, Tuesday, Oct. 11, 2005, near Arlalyk, Kazakhstan. Krikalev and NASA astronaut John Phillips landed after a six-month mission in orbit. Along with American businessman Greg Olsen, who visited the station for more than a week, Phillips and Krikalev returned to Earth aboard a Russian Soyuz spacecraft. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev autographs the door to his cosmonaut hotel room, part of a pre-launch tradition, prior to the launch aboard the Soyuz TMA-6 spacecraft, Thursday, April 14, 2005, in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Sergey Krikalev, Executive Director for Piloted Spaceflights for Roscosmos, is seen during the Heads of Agency press conference at the 70th International Astronautical Congress, Monday, Oct. 21, 2019 at the Walter E. Washington Convention Center in Washington. Photo Credit: (NASA/Bill Ingalls)

Roscosmos cosmonaut and executive director for piloted spaceflights, Sergey Krikalev, speaks during an astronaut panel discussion at the 70th International Astronautical Congress, Friday, Oct. 25, 2019, at the Walter E. Washington Convention Center in Washington. Photo credit: (NASA/Aubrey Gemignani)

Expedition 11 crew Commander Sergei Krikalev places the Expedition 11 crew logo onboard the prime crew bus as they head to the cosmodrome for suit up, Thursday, April 14, 2005, in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Sergey Krikalev, Executive Director for Piloted Spaceflights for Roscosmos, is seen during the Heads of Agency Plenary of the 70th International Astronautical Congress, Monday, Oct. 21, 2019 at the Walter E. Washington Convention Center in Washington. Photo Credit: (NASA/Bill Ingalls)

Sergey Krikalev, Executive Director for Piloted Spaceflights for Roscosmos, speaks during the Heads of Agency Plenary of the 70th International Astronautical Congress, Monday, Oct. 21, 2019 at the Walter E. Washington Convention Center in Washington. Photo Credit: (NASA/Joel Kowsky)

Roscosmos cosmonaut Sergey Kud-Sverchkov, walks to board the Soyuz rocket with, Sergei Krikalev, left, and Roscosmos Director General Yuriy Borisov, Thursday, Nov. 27, 2025 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket will send Kud-Sverchkov, Roscosmos cosmonaut Sergei Mikaev, and NASA astronaut Chris Williams, on a mission to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Members of the 11th expedition to the International Space Station, astronaut John Phillips, top left, and cosmonaut Sergei Krikalev, front, arrive at Star City, Russia, Tuesday, Oct. 11, 2005. The crew landed near Arlalyk, Kazakhstan after a six-month mission in orbit. Along with American businessman Greg Olsen, who visited the station for more than a week, Phillips and Krikalev returned to Earth aboard a Russian Soyuz spacecraft. Photo Credit: (NASA/Bill Ingalls)

Members of the 11th expedition to the International Space Station, astronaut John Phillips, seated left, and Cosmonaut Sergei Krikalev, seated center, landed near Arlalyk, Kazakhstan Tuesday, Oct. 11 2005, after a six-month mission in orbit. Along with American businessman Greg Olsen, seated right, who visited the station for more than a week, Phillips and Krikalev returned to Earth aboard a Russian Soyuz spacecraft. Photo Credit: (NASA/Bill Ingalls)

Roscosmos cosmonaut and executive director for piloted spaceflights, Sergey Krikalev speaks to former NASA Administrator and astronaut, Charlie Bolden during an astronaut and cosmonaut panel discussion at the 70th International Astronautical Congress, Friday, Oct. 25, 2019 at the Walter E. Washington Convention Center in Washington. Photo credit: (NASA/Aubrey Gemignani)

Roscosmos Executive director of Human Spaceflight Programs Sergei Krikalev, is seen as NASA, Roscosmos, and Russian Search and Recovery Forces meet at the Cosmonaut Hotel in Karaganda, Kazakhstan to discuss the readiness for the landing of Expedition 66 crew members Mark Vande Hei of NASA, and Pyotr Dubrov, and Anton Shkaplerov of Roscosmos, Monday, March 28, 2022, at the Cosmonaut Hotel in Karaganda, Kazakhstan. Vande Hei and Dubrov will be returning to Earth after logging 355 days in space as members of Expeditions 64-66 aboard the International Space Station. For Vande Hei, his mission is the longest single spaceflight by a U.S. astronaut in history. Shkaplerov will be returning after 176 days in space, serving as a Flight Engineer for Expedition 65 and commander of Expedition 66. Photo Credit: (NASA/Bill Ingalls)

Roscosmos Director of Human Spaceflight Programs Sergei Krikalev, Roscosmos Director General Dmitry Rogozin, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Roscosmos Director of Human Spaceflight Programs Sergei Krikalev, left, Roscosmos Director General Dmitry Rogozin, center, and NASA Associate Administrator for the Human Exploration and Operations Directorate William Gerstenmaier answer questions during a Expedition 59 post-docking press conference, Friday, March 15, 2019 at the Baikonur Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Chief, State Organization, Gagarin Research and Test Cosmonaut Training Center, Sergei Krikalev, speaks during the State Commission meeting to approve the Soyuz launch of Expedition 21 Flight Engineer Jeffrey N. Williams, Flight Engineer Maxim Suraev and Spaceflight Participant Guy Laliberté on Tuesday, Sept. 29, 2009 in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Sergei Krikalev, Chief, State Organization, Gagarin Research and Test Cosmonaut Training Center speaks during the State Commission meeting to approve the Soyuz launch of Expedition 23 Soyuz Commander Alexander Skvortsov, Flight Engineer Tracy Caldwell Dyson and Flight Engineer Mikhail Kornienko on Thursday, April 1, 2010, in Baikonur, Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 11 Commander Sergei Krikalev speaks to the press, Thursday, April 14, 2005, in Baikonur, Kazakhstan. Kiralev, Flight Engineer and NASA Science Officer John Phillips and European Space Agency astronaut Roberto Vittori, of Italy, are scheduled to launch aboard a Soyuz TMA-6 spacecraft April 15. Krikalev and Phillips will spend six months on the station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the station under a commerical contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, front, Flight Engineer John Phillips and European Space Agency astronaut Roberto Vittori, second from rear, arrive at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Saturday, April 9, 2005, for pre-launch preparations. Krikalev, Phillips and Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the Station, while Vittori spends eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Chief, Gagarin Cosmonaut Training Center, Sergei Krikalev shakes hands and welcomes home Expedition 27 Commander Dmitry Kondratyev at the Chkalovsky airport outside Star City, Russia several hours after Kondratyev and Flight Engineers Paolo Nespoli and Cady Coleman landed in their Soyuz TMA-20 southeast of the town of Zhezkazgan, Kazakhstan, on Tuesday, May 24, 2011. NASA Astronaut Coleman, Russian Cosmonaut Kondratyev and Italian Astronaut Nespoli are returning from more than five months onboard the International Space Station where they served as members of the Expedition 26 and 27 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev checks his gear prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005, for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, and European Space Agency astronaut Roberto Vittori, of Italy, are seen in their Russian Sokol suits prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 15, 2005. Photo Credit: (NASA/Bill Ingalls)

Technicians work on the Russian Sokol suit of Expedition 11 Commander Sergei Krikalev, seated, prior to launch aboard the Soyuz TMA-6 spacecraft at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 15, 2005 for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left and Flight Engineer and NASA Science Officer John Phillips talk during a bus ride prior to launch, Friday, April 15, 2005 at the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev checks his gear prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005, for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Former NASA Administrator and astronaut, Charlie Bolden, right, shakes hands with Roscosmos cosmonaut and executive director for piloted spaceflights, Dr. Sergey Krikalev after being presented with the Order of Friendship (Russian Governmental award) during the 70th International Astronautical Congress, Friday, Oct. 25, 2019 at the Walter E. Washington Convention Center in Washington. Photo credit: (NASA/Aubrey Gemignani)

European Space Agency astronaut Roberto Vittori, of Italy, left, and Expedition 11 Commander Sergei Krikalev participate in tilt table tests, Sunday, April 10, 2005, so technicians can collect pre-launch data on the state of their equilibrium prior to the April 15 launch to the International Space Station with Flight Engineer John Phillips in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Chief, State Organization, Gagarin Research and Test Cosmonaut Training Center, Sergei Krikalev, speaks during the State Commission meeting to approve the Soyuz launch of Expedition 36 Soyuz Commander Fyodor Yurchikhin of the Russian Federal Space Agency (Roscosmos), Flight Engineers; Karen Nyberg of NASA, and Luca Parmitano at the Cosmonaut Hotel, Monday, May 27, 2013, in Kazakhstan. Photo credit: (NASA/Bill Ingalls)

Ambassador of the United States of America to the Russian Federation, John Beyrle, left, NASA Administrator Charles Bolden, center, and Chief, State Organization, Gagarin Research and Test Cosmonaut Training Center, Sergei Krikalev, pose for a photograph shortly after the successful Soyuz launch of Expedition 21 Flight Engineer Maxim Suraev, Expedition 21 Flight Engineer Jeffrey N. Williams and Spaceflight Participant Guy Laliberté, Wednesday, Sept. 30, 2009 in Baikonur, Kazakhstan. Photo Credit: (NASA/Victor Zelentsov)

Expedition 11 Flight Engineer and NASA Science Officer John Phillips, left, Commander Sergei Krikalev and European Space Agency Astronaut Roberto Vittori, of Italy, receive the traditional pre-launch blessing, Thursday, April 14, 2005, prior to their launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan. Krikalev and Phillips will spend six months on the station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Flight Engineer and NASA Science Officer John Phillips, left, Commander Sergei Krikalev and European Space Agency Astronaut Roberto Vittori, of Italy, receive the traditional pre-launch blessing, Thursday, April 14, 2005, prior to their launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan. Krikalev and Phillips will spend six months on the station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Flight Engineer John Phillips, left, European Space Agency Astronaut Roberto Vittori, of Italy and Commander Sergei Krikalev, right, walk in the Cosmonaut hotel in Baikonur, Kazakhstan, Monday, April 11, 2005. The trio will launch April 15 aboard a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori will spend eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Flight Engineer John Phillips, left, Commander Sergei Krikalev and European Space Agency astronaut Roberto Vittori, right, discuss the checkout of the Soyuz TMA-6 spacecraft with Russian space officials at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Sunday, April 10, 2005, during preparations for their launch to the International Space Station. Krikalev, Phillips and Vittori will launch April 15 on the Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, is outfitted in his Russian Sokol suit, Friday, April 15, 2005, in Baikonur, Kazakhstan. Krikalev, along with Flight Engineer and NASA Science Officer John Phillips and European Space Agency Astronaut Roberto Vittori, of Italy, were preparing for launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan at daybreak on April 15 for a two-day trip to the International Space Station. Krikalev and Phillips will spend six months on the station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commerical contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev enters the Soyuz TMA-6 spacecraft at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Sunday, April 10, 2005, during preparations for launch to the International Space Station. Krikalev, along with Flight Engineer John Phillips and European Space Agency astronaut Roberto Vittori will launch April 15 on the Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Flight Engineer John Phillips, left, Commander Sergei Krikalev and European Space Agency astronaut Roberto Vittori, right hidden, discuss the checkout of the Soyuz TMA-6 spacecraft with Russian space officials at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Sunday, April 10, 2005, during preparations for their launch to the International Space Station. Krikalev, Phillips and Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, seated, is outfitted in his Russian Sokol suit, Friday, April 15, 2005, in Baikonur, Kazakhstan. Krikalev, along with Flight Engineer and NASA Science Officer John Phillips and European Space Agency Astronaut Roberto Vittori, of Italy, were preparing for launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan at daybreak on April 15 for a two-day trip to the International Space Station. Krikalev and Phillips will spend six months on the station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commerical contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, Flight Engineer John Phillips bid farewell as they depart the Gagarin Cosmonaut Training Center training base, Saturday, April 9, 2005, in Star City, Russia to travel to the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. Krikalev, Phillips along with European Space Agency Astronaut Roberto Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the Station, while Vittori spends eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, center, Flight Engineer John Phillips, left, and European Space Agency Astronaut Roberto Vittori, of Italy, answer questions from the media prior to their departure from the Gagarin Cosmonaut Training Center training base, Saturday, April 9, 2005, in Star City, Russia. The trio traveled to the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. Krikalev, Phillips and Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the Station, while Vittori spends eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, center, Flight Engineer John Phillips, left, and European Space Agency Astronaut Roberto Vittori, of Italy, answer questions from the media prior to their departure from the Gagarin Cosmonaut Training Center training base, Saturday, April 9, 2005, in Star City, Russia. The trio traveled to the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. Krikalev, Phillips and Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the Station, while Vittori spends eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, and Flight Engineer John Phillips discuss the checkout of the Soyuz TMA-6 spacecraft with the press at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Sunday, April 10, 2005, during preparations for their launch to the International Space Station. Krikalev, Phillips and European Space Agency astronaut Roberto Vittori will launch April 15 on the Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, center, accompanied by Flight Engineer John Phillips, left, and European Space Agency Astronaut Roberto Vittori of Italy are seen at the Gagarin Cosmonaut Training Center training base, Saturday, April 9, 2005, in Star City, Russia, prior to their departure to the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. Krikalev, Phillips and Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the Station, while Vittori spends eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, center, Flight Engineer John Phillips, left, and European Space Agency Astronaut Roberto Vittori of Italy, far right, depart the Gagarin Cosmonaut Training Center training base, Saturday, April 9, 2005, in Star City, Russia for travel to the Baikonur Cosmodrome in Kazakhstan for final pre-launch preparations. Krikalev, Phillips and Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the Station, while Vittori spends eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, right, is outfitted in his Russian Sokol suit, Friday, April 15, 2005, in Baikonur, Kazakhstan. Krikalev, along with Flight Engineer and NASA Science Officer John Phillips and European Space Agency Astronaut Roberto Vittori of Italy were preparing for launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan at daybreak on April 15 for a two-day trip to the International Space Station. Krikalev and Phillips will spend six months on the station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commerical contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, Flight Engineer John Phillips and European Space Agency astronaut Roberto Vittori, right, discuss the checkout of the Soyuz TMA-6 spacecraft with Russian space officials at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Sunday, April 10, 2005, during preparations for their launch to the International Space Station. Krikalev, Phillips and Vittori will launch April 15 on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

NASA Astronaut Office Representative, astronaut Drew Feustel, left, and Roscosmos Executive director of Human Spaceflight Programs Sergei Krikalev, give autographs to children from a local school, Monday, March 28, 2022, at the Cosmonaut Hotel in Karaganda, Kazakhstan. The two were part of an earlier meeting where NASA, Roscosmos, and Russian Search and Recovery Forces meet to discuss the readiness for the landing of Expedition 66 crew members Mark Vande Hei of NASA, and Pyotr Dubrov, and Anton Shkaplerov of Roscosmos. Vande Hei and Dubrov will be returning to Earth after logging 355 days in space as members of Expeditions 64-66 aboard the International Space Station. For Vande Hei, his mission is the longest single spaceflight by a U.S. astronaut in history. Shkaplerov will be returning after 176 days in space, serving as a Flight Engineer for Expedition 65 and commander of Expedition 66. Photo Credit: (NASA/Bill Ingalls)

Technicians work on the Russian Sokol suits of Expedition 11 Flight Engineer and NASA Science Officer John Phillips, seated left, and Commander Sergei Krikalev, seated right, prior to launch aboard the Soyuz TMA-6 spacecraft at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 15, 2005, for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, center, Flight Engineer and NASA Science Officer John Phillips, left, and European Space Agency Astronaut Roberto Vittori, of Italy, are seen, Friday, April 15, 2005, prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Chief, State Organization, Gagarin Research and Test Cosmonaut Training Center, Sergei Krikalev, left, Ambassador of the United States of America to the Russian Federation, John Beyrle, center, and NASA Administrator Charles Bolden say hello to each other prior to talking to Expedition 21 crew members Maxim Suraev, Jeffrey N. Williams and Spaceflight Participant Guy Laliberté, Wednesday, Sept. 30, 2009 in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Technicians work on the Russian Sokol suit of Expedition 11 Flight Engineer and NASA Science Officer John Phillips, seated left, and Commander Sergei Krikalev, seated right, prior to launch aboard the Soyuz TMA-6 spacecraft at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 15, 2005, for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Technicians work on the Russian Sokol suits of Expedition 11 Flight Engineer and NASA Science Officer John Phillips, seated left, Commander Sergei Krikalev and European Space Agency astronaut Roberto Vittori, of Italy, prior to launch aboard the Soyuz TMA-6 spacecraft at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 15, 2005 for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, seated center, Flight Engineer and NASA Science Officer John Phillips, seated left and European Space Agency Astronaut Roberto Vittori, of Italy, seated right, relax prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005 for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, and Flight Engineer and NASA Science Officer John Phillips, seated right, along with NASA astronaut Dan Tani, standing, are seen, Friday, April 15, 2005, during preparations for launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, center, Flight Engineer and NASA Science Officer John Phillips, left, and European Space Agency Astronaut Roberto Vittori, of Italy, are seen as technicians work on their Russian Sokol suits prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005 for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Technicians work on the Russian Sokol suits of Expedition 11 Flight Engineer and NASA Science Officer John Phillips, far left, and Commander Sergei Krikalev and European Space Agency astronaut Roberto Vittori, of Italy, right, prior to launch aboard the Soyuz TMA-6 spacecraft at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 15, 2005 for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, foreground, and Flight Engineer and NASA Science Officer John Phillips, left, are seen in their Russian Sokol suits prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005 for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

NASA's Chief Astronaut Kent Rommenger, standing left, talks with Expedition 11 Commander Sergei Krikalev, right, Flight Engineer and NASA Science Officer John Phillips prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005, for a two-day trip to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, center, Flight Engineer and NASA Science Officer John Phillips and European Space Agency Astronaut Roberto Vittori, of Italy, right, talk to Anatoly Perminov, Head of the Russian Federal Space Agency (ROSCOSMOS) prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005. Krikalev and Phillips will spend six months on the Station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, Flight Engineer and NASA Science Officer John Phillips and European Space Agency Astronaut Roberto Vittori, of Italy, talk to Anatoly Perminov, Head of the Russian Federal Space Agency (ROSCOSMOS) prior to launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan, Friday, April 15, 2005. Krikalev and Phillips will spend six months on the Station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commercial contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Flight Engineer and NASA Science Officer John Phillips, left, crew Commander Sergei Krikalev and European Space Agency Astronaut Roberto Vittori, of Italy, join together at a press conference, Thursday, April 14, 2005, prior to their April 15 launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan. Krikalev and Phillips will spend six months on the station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commerical contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

European Space Agency Astronaut Roberto Vittori, of Italy, left, Expedition 11 Flight Engineer John Phillips, Commander Sergei Krikalev and backup, Russian Commander Mikhail Tyurin, right, watch a video about a Soyuz landing at the Cosmonaut Hotel in Baikonur, Kazakhstan, Monday, April 11, 2005, during preparations for the April 15 launch on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Former NASA astronaut Leland Melvin, left, moderates a panel with, from left to right, Roscosmos cosmonaut and executive director for piloted spaceflights, Sergey Krikalev; former NASA astronaut Mary Cleave; former NASA Administrator and astronaut, Charlie Bolden; ESA (European Space Agency) astronaut, André Kuipers; and European astronaut and professor, Institute of Space Systems, Reinhold Ewald, during the 70th International Astronautical Congress, Friday, Oct. 25, 2019, at the Walter E. Washington Convention Center in Washington. Photo credit: (NASA/Aubrey Gemignani)

Former NASA astronaut Leland Melvin, left, moderates a panel with, from left to right, Roscosmos cosmonaut and executive director for piloted spaceflights, Sergey Krikalev; former NASA astronaut Mary Cleave; former NASA Administrator and astronaut, Charlie Bolden; ESA (European Space Agency) astronaut, André Kuipers; and European astronaut and professor, Institute of Space Systems, Reinhold Ewald, during the 70th International Astronautical Congress, Friday, Oct. 25, 2019, at the Walter E. Washington Convention Center in Washington. Photo credit: (NASA/Aubrey Gemignani)

Former NASA astronaut Leland Melvin, left, moderates a panel with, from left to right, Roscosmos cosmonaut and executive director for piloted spaceflights, Sergey Krikalev; former NASA astronaut Mary Cleave, former NASA Administrator and astronaut, Charlie Bolden; ESA (European Space Agency) astronaut, André Kuipers (not pictured); and European astronaut and professor, Institute of Space Systems, Reinhold Ewald, during the 70th International Astronautical Congress, Friday, Oct. 25, 2019, at the Walter E. Washington Convention Center in Washington. Photo credit: (NASA/Aubrey Gemignani)

Members of the astronaut panel discussion, from left to right, Roscosmos cosmonaut and executive director for piloted spaceflights, Sergey Krikalev; former NASA astronaut Leland Melvin; former NASA astronaut Mary Cleave; former NASA Administrator and astronaut, Charlie Bolden; former Cosmonaut Dumitru-Dorin Prunariu; ESA (European Space Agency) astronaut, André Kuipers; and European astronaut and professor, Institute of Space Systems, Reinhold Ewald, pose while the audience takes photos, at the conclusion of the event; during the 70th International Astronautical Congress, Friday, Oct. 25, 2019, at the Walter E. Washington Convention Center in Washington. Photo credit: (NASA/Aubrey Gemignani)

Expedition 11 Training with Krikalev/Henderson as their continued their training in the Virtual Reality Laboratory in building 9. View includes: Sergei Krikalev and Henderson using the virtual optics to view the International Space Station.

Expedition 11 Commander Sergei Krikalev, left, European Space Agency astronaut Roberto Vittori, of Italy, Flight Engineer John Phillips, third from left, along with their backups, Russian Commander Mikhail Tyurin, American Dan Tani and Robert Thirsk, of Canada, far right, participate in the traditional raising of their countries’ flags outside their crew quarters in Baikonur, Kazakhstan on Monday, April 11, 2005, during preparations for the April 15 launch on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, European Space Agency astronaut Roberto Vittori, of Italy, Flight Engineer John Phillips, third from left, along with their backups, Russian Commander Mikhail Tyurin, American Dan Tani and Robert Thirsk, of Canada, far right, participate in the traditional raising of their countries’ flags outside their crew quarters in Baikonur, Kazakhstan on Monday, April 11, 2005, during preparations for the April 15 launch on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 backup crew Robert Thirsk of Canada, left, American Dan Tani, Russian Commander Mikhail Tyurin and prime Expedition 11 crew Commander Sergei Krikalev, fourth from left, Flight Engineer and NASA Science Officer John Phillips and European Space Agency Astronaut Roberto Vittori of Italy, right, talk to the press, Thursday, April 14, 2005, prior to the April 15 launch aboard the Soyuz TMA-6 spacecraft from the Baikonur Cosmodrome in Kazakhstan. Krikalev and Phillips will spend six months on the Station, replacing Expedition 10 Commander Leroy Chiao and Flight Engineer Salizhan Sharipov, while Vittori will spend eight days on the Station under a commerical contract between ESA and the Russian Federal Space Agency, returning to Earth with Chiao and Sharipov on April 25. Photo Credit: (NASA/Bill Ingalls)

Expedition 11 Commander Sergei Krikalev, left, European Space Agency astronaut Roberto Vittori, of Italy, Flight Engineer John Phillips, third from left, along with their backups, Russian Commander Mikhail Tyurin, American Dan Tani and Robert Thirsk, of Canada, far right, participate in the traditional raising of their countries’ flags outside their crew quarters in Baikonur, Kazakhstan on Monday, April 11, 2005, during preparations for the April 15 launch on a Soyuz TMA-6 spacecraft to the International Space Station. Krikalev and Phillips will spend six months in space and greet the first Shuttle crew to fly in more than two years when it arrives at the station, while Vittori spends eight days on the station under a commercial contract between ESA and the Russian Federal Space Agency. Photo Credit: (NASA/Bill Ingalls)

JSC2004-E-26778 (24 June 2004) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia’s Federal Space Agency, participates in medical training at Johnson Space Center (JSC). Space Medicine Instructor Tyler N. Carruth with Wyle Life Sciences assisted Krikalev.

STS102-E-5142 (12 March 2001) --- Cosmonaut Sergei K. Krikalev, now a member of the STS-102 crew, prepares to use a camera on Discovery's flight deck. Krikalev, representing Rosaviakosmos, had been onboard the International Space Station (ISS) since early November 2000. The photograph was taken with a digital still camera.

STS102-E-5139 (12 March 2001) --- Cosmonaut Sergei K. Krikalev, now a member of the STS-102 crew, prepares to use a camera on Discovery's flight deck. Krikalev, representing Rosaviakosmos, had been onboard the International Space Station (ISS) since early November 2000. The photograph was taken with a digital still camera.

JSC2002-01972 (28 October 2002) --- Cosmonaut Sergei K. Krikalev, backup Expedition Seven mission commander, floats in a small life raft during an emergency bailout training session in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center (JSC). Krikalev represents Rosaviakosmos.

S88-E-5081 (12-11-98) --- James H. Newman (left) and Sergei Krikalev are in communications with ground controllers while working aboard Zarya. The two are mission specialists, with Krikalev representing the Russian Space Agency (RSA). The photo was taken with an electronic still camera (ESC) at 05:23:01 GMT, Dec. 11.

ISS011-E-08468 (9 June 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, holds tools in the Zvezda Service Module on the International Space Station (ISS). Krikalev was preparing to perform an in-flight maintenance task.

STS098-352-021 (7-20 February 2001) --- Cosmonaut Sergei K. Krikalev, Expedition One flight engineer, photographs astronaut Kenneth D. Cockrell, STS-98 mission commander, using an IMAX camera aboard the newly-attached Destiny laboratory on the International Space Station (ISS). Krikalev represents Rosaviakosmos.

STS098-355-017 (7-20 February 2001) --- Cosmonaut Sergei K. Krikalev, Expedition One flight engineer, waves as he moves the hatch of the Pressurized Mating Adapter (PMA) leading to the Space Shuttle Atlantis. Krikalev represents Rosaviakosmos.

S. Somanath, Director of Vikram Sarabhai Space Centre, Indian Space Research Organization (ISRO), left, NASA Administrator Jim Bridenstine, Hiroshi Yamakawa, President of the Japan Aerospace Exploration Agency (JAXA), Sergey Krikalev, Executive Director for Piloted Spaceflights for Roscosmos, and Johann-Dietrich Woerner, Director General of ESA (European Space Agency), right, are seen during the Heads of Agency press conference at the 70th International Astronautical Congress, Monday, Oct. 21, 2019 at the Walter E. Washington Convention Center in Washington. Photo Credit: (NASA/Joel Kowsky)

S. Somanath, Director of Vikram Sarabhai Space Centre, Indian Space Research Organization (ISRO), left, NASA Administrator Jim Bridenstine, Hiroshi Yamakawa, President of the Japan Aerospace Exploration Agency (JAXA), Sergey Krikalev, Executive Director for Piloted Spaceflights for Roscosmos, and Johann-Dietrich Woerner, Director General of ESA (European Space Agency), right, are seen during the Heads of Agency press conference at the 70th International Astronautical Congress, Monday, Oct. 21, 2019 at the Walter E. Washington Convention Center in Washington. Photo Credit: (NASA/Joel Kowsky)

JSC2000-E-27078 (16 October 2000) --- Expedition One crew members in Moscow. From left, flight engineer Sergei Krikalev, expedition coammander William (Bill) Shepherd and Soyuz pilot Yuri Gidzenko.

ISS011-E-11009 (28 July 2005) --- Cosmonaut Sergei Krikalev of Russia's Federal Space Agency, Expedition 11 commander onboard the International Space Station (ISS), communicates with the crew onboard the soon to be approaching Space Shuttle.

ISS011-E-13494 (22 September 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, inserts a syringe into a bag while working in the Zarya module of the international space station.

ISS011-E-07561 (30 May 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, participates in hardware transfers on the International Space Station (ISS).

JSC2000-E-27075 (16 October 2000) --- Expedition One crew members in Moscow. From left, flight engineer Sergei Krikalev, expedition commander William (Bill) Shepherd and Soyuz pilot Yuri Gidzenko.

ISS011-E-07590 (30 May 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, participates in hardware transfers on the International Space Station (ISS).

ISS011-E-13496 (22 September 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, reaches into a bag for supplies in the Zarya module of the international space station.

S88-E-5072 (12-11-98) --- Sergei Krikalev, mission specialist representing the Russian Space Agency (RSA), onboard Zarya. The photo was taken with an electronic still camera at 01:54:25 GMT, Dec. 11.

ISS011-E-12403 (28 July 2005) --- Cosmonaut Sergei K. Krikalev, Expedition 11 commander representing Russia's Federal Space Agency, holds tools while floating into the Destiny laboratory on the International Space Station.

S88-E-5089 (12-11-98) --- Sergei Krikalev, mission specialist representing the Russian Space Agency (RSA), floats in the Unity module on Flight Day 8. A banner displaying the flags of all the ISS participants is at right.

ISS01-E-5100 (December 2000) --- Cosmonaut Sergei K. Krikalev, Expedition One flight engineer, retrieves some tools on the International Space Station's Zvezda Service Module.

S88-E-5170 (12-15-98) --- A pre-set electronic still camera (ESC) was used to take one of the traditional in-flight crew portraits for the STS-88 members on Endeavour's mid deck. From the left are Frederick W. (Rick) Sturckow, Jerry L. Ross, James H. Newman, Nancy J. Currie, Robert D. Cabana and Sergei K. Krikalev. Krikalev, representing the Russian Space Agency (RSA), has been assigned as one of the crew members for the first ISS crew. A banner representing the participating countries for ISS and a model (near Krikalev) of the connected Unity-Zarya modules are in the background. The photo was taken at 00:12:48 GMT, Dec. 15.

STS-88 Mission Specialist Sergei Konstantinovich Krikalev gets assistance from suit technician George Brittingham while donning his orange launch and entry suit in the Operations and Checkout Building. STS-88 will be Krikalev’s fourth spaceflight, but only his second on the Space Shuttle. He also twice flew on long-duration missions aboard the Russian Space Station Mir. Krikalev and the five other STS-88 crew members will depart shortly for Launch Pad 39A where the Space Shuttle Endeavour is poised for liftoff on the first U.S. mission dedicated to the assembly of the International Space Station

ISS01-E-5049 (8 December 2000) --- Expedition One flight engineer Sergei K. Krikalev reminisces for a brief moment during his visit aboard the Space Shuttle Endeavour. Krikalev is on the mid deck in this scene. Now assigned to a three-month stint aboard the International Space Station (ISS), the cosmonaut and his two Expedition One crew mates enjoyed a reunion with the STS-97 astronauts on Flight Day 9. In his cosmonaut career Krikalev has been assigned duty on missions aboard the shuttle, ISS, and the Russian Aviation and Space Agency's space station Mir.