S97-00690 (18 Oct 1996) --- Astronaut Chris A. Hadfield, mission specialist representing the Canadian Space Agency (CSA).

S95-12502 (8 June 1995) --- Astronaut Chris A. Hadfield, mission specialist representing the Canadian Space Agency (CSA), simulates controlling the Shuttle?s Canadian-built Remote Maneuvering System (RMS). Hadfield uses special training hardware known as the Manipulator Development Facility (MDF), located in the Systems Integration Facility at NASA?s Johnson Space Center (JSC).

Expedition 34/35 Flight Engineer and Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) answers a reporter's question at a press conference held at the Cosmonaut Hotel, on Tuesday, Dec. 18, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for December 19 and will send Hadfield, Tom Marshburn of NASA and Roman Romanenko of ROSCOSMOS on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

View of Canadian Space Agency (CSA) Chris Hadfield,Expedition 34 Flight Engineer (FE),using still camera,in the Cupola Module. Photo was taken during Expedition 34.

ISS034-E-024095 (7 Jan. 2013) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, holds a still camera while looking through a window in the Cupola of the International Space Station.

Date: 12-05-11 Location: Bldg 17, Food Lab Subject: Expedition 34 Soyuz crew Tom Marshburn and Chris Hadfield during their food tasting Photographer: James Blair

Expedition 34/35 Flight Engineer and Expedition 35 ISS Commander Chris Hadfield, of the Canadian Space Agency (CSA), performs the traditional door signing before he and fellow cremates, Flight Engineer Tom Marshburn, and Soyuz Commander Roman Romanenko depart the Cosmonaut Hotel for their Soyuz launch to the International Space Station on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) smiles as he rests outside of the Soyuz TMA-07M spacecraft shortly after the capsule landed with NASA Flight Engineer Tom Marshburn and Russian Flight Engineer Roman Romanenko in a remote area outside of the town of Zhezkazgan, Kazakhstan on Tuesday, May 14, 2013. Hadfield, Marshburn and Romanenko are returning from five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

View of Canadian Space Agency (CSA) Chris Hadfield, Expedition 34 Flight Engineer (FE), wiring the condensate transfer pump, in the U.S. Laboratory. Image was released via astronaut Twitter. Original camera number is 268C1459. Photo was taken during Expedition 34.

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

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

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

Expedition 34/35 Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA) waves goodbye as he boards the bus that will take him to the launch pad where he and his fellow crew mates will board their Soyuz TMA-07M rocket, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. The crew are donning special cold-weather suits over their Sokol suits to keep them insulated from the extreme sub-zero temperature. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Victor Zelentsov)

Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA) is seen in a gift of traditional Kazakhstan dress during a welcome ceremony at the Karaganda Airport in Kazakhstan on Tuesday, May 14, 2013. Hadfield, Expedition 35 NASA Flight Engineer Tom Marshburn and Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos) returned to earth from more than five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

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

Expedition 34/35 Flight Engineer Tom Marshburn of NASA, left, Soyuz Commander Roman Romanenko and Canadian Space Agency (CSA) Flight Engineer Chris Hadfield, right, pose for a photo at a press conference held at the Cosmonaut Hotel, on Tuesday, Dec. 18, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for December 19 and will send Marshburn, Romanenko and Hadfield on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 crew members, Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), left, Soyuz Commander Roman Romanenko, and Flight Engineer Tom Marshburn of NASA, right, depart the Cosmonaut Hotel to head to another building across the Baikonur Cosmodrome where they will suit-up for their soyuz launch, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Victor Zelentsov)

Expedition 34/35 crew members, Flight Engineer Tom Marshburn of NASA, left, Soyuz Commander Roman Romanenko of ROSCOSMOS, and Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), right, wave farewell to family and friends as they depart the Cosmonaut Hotel to suit-up for their soyuz launch to the International Space Station on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), right, receives the traditional blessing from a Russian Orthodox priest at the Cosmonaut Hotel on the morning of their Soyuz launch to the International Space Station on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of a Soyuz rocket later in the afternoon will send Hadfield, Roman Romanenko of Russia and Tom Marschburn of the United States on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 Flight Engineer Tom Marshburn of NASA, left, Soyuz Commander Roman Romanenko and Canadian Space Agency (CSA) Flight Engineer Chris Hadfield, right, are seen during a press conference held at the Cosmonaut Hotel, on Tuesday, Dec. 18, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for December 19 and will send Marshburn, Romanenko and Hadfield on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 Flight Engineer Chris Hadfield has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-07M spacecraft to the International Space Station with fellow cremates, Flight Engineer Tom Marshburn and Soyuz Commander Roman Romanenko, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-07M spacecraft to the International Space Station with fellow cremates, Flight Engineer Tom Marshburn and Soyuz Commander Roman Romanenko, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-07M spacecraft to the International Space Station with fellow cremates, Flight Engineer Tom Marshburn and Soyuz Commander Roman Romanenko, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield of CSA is helped into his Russian Sokol suit as he and fellow cremates, Soyuz Commander Roman Romanenko and Flight Engineer Tom Marshburn prepare for their Soyuz launch to the International Space Station, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-07M spacecraft to the International Space Station with fellow cremates, Flight Engineer Tom Marshburn and Soyuz Commander Roman Romanenko, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA), right, Russian Flight Engineer Roman Romanenko and NASA Flight Engineer Tom Marshburn, left, are seen in a gift of traditional Kazakhstan dress during a welcome ceremony at the Karaganda Airport in Kazakhstan on Tuesday, May 14, 2013. Hadfield, Marshburn and Romanenko returned to earth from more than five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 Flight Engineer Chris Hadfield of CSA is helped into his Russian Sokol suit as he and fellow cremates, Soyuz Commander Roman Romanenko and Flight Engineer Tom Marshburn prepare for their Soyuz launch to the International Space Station, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Tom Marshburn, left, Soyuz Commander Roman Romanenko, and Flight Engineer Chris Hadfield, right, are seen after donning their Russian Sokol suits in preparation for their launch, on Wednesday, Dec. 19, 2012, at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket will send Marshburn, Romanenko and Hadfield on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-07M spacecraft to the International Space Station with fellow cremates, Flight Engineer Tom Marshburn and Soyuz Commander Roman Romanenko, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-07M spacecraft to the International Space Station with fellow cremates, Flight Engineer Tom Marshburn and Soyuz Commander Roman Romanenko, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield of CSA is helped into his Russian Sokol suit as he and fellow cremates, Soyuz Commander Roman Romanenko and Flight Engineer Tom Marshburn prepare for their Soyuz launch to the International Space Station, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Flight Engineer Chris Hadfield of CSA is helped into his Russian Sokol suit as he and fellow cremates, Soyuz Commander Roman Romanenko and Flight Engineer Tom Marshburn prepare for their Soyuz launch to the International Space Station, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 Soyuz Commander Roman Romanenko, left, and Flight Engineer Chris Hadfield speak to family members after having their Sokol suits pressure checked prior to their launch to the International Space Station, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Marshburn, Romanenko and Hadfield on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 34/35 crew members, Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), left, Soyuz Commander Roman Romanenko, and Flight Engineer Tom Marshburn of NASA, right, depart the Cosmonaut Hotel to head to another building across the Baikonur Cosmodrome where they will suit-up for their soyuz launch, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

ISS035-E-008937 (26 March 2013) --- Expedition 35 Commander Chris Hadfield (right) of the Canadian Space Agency and Flight Engineer Tom Marshburn of NASA are pictured in the Cupola on the International Space Station during the operations that ultimately led to the release of the SpaceX Dragon-2 spacecraft for its return to Earth after a three-week stay aboard the orbital outpost. The Dragon was scheduled to make a landing in the Pacific Ocean, off the coast of California, later in the day.

ISS035-E-018389 (11 April 2013) --- Expedition 35 Flight Engineer Tom Marshburn, NASA astronaut, works to install the redundant Ku Communications 1 unit in Destiny to complete the refurbishment of the Ku system aboard the International Space Station. Expedition 35 Commander Chris Hadfield (out of frame), astronaut with the Canadian Space Agency, joined Marshburn for this work.

Quarantined Expedition 32 Canadian backup crewmember Chris Hadfield answers reporters questions from behind glass during a prelaunch press conference held at the Cosmonaut Hotel on Friday, July 13, 2012 in Baikonur, Kazakhstan. Photo Credit (NASA/Carla Cioffi)

Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA), left, Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos), center, and NASA Flight Engineer Tom Marshburn sit in chairs outside the Soyuz Capsule just minutes after they landed in a remote area outside the town of Zhezkazgan, Kazakhstan, on Tuesday, May 14, 2013. Hadfield, Romanenko and Marshburn are returning from five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 crew members, Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), left, Soyuz Commander Roman Romanenko, and Flight Engineer Tom Marshburn of NASA, right, depart Bulding 254 at the Baikonur Cosmodrome to head to the launch pad where they will board their Soyuz TMA-07M rocket, on Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. The crew are donning special cold-weather suits over their Sokol suits to keep them insulated from the extreme sub-zero temperature. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Victor Zelentsov)

Expedition 34/35 Canadian Space Agency astronaut and Expedition 35 Commander Chris Hadfield is escorted to the Soyuz rocket by Russian Space Agency Officials, prior to his launch onboard a Soyuz TMA-07M spacecraft with fellow crew members, Russian Cosmonaut and Soyuz Commander Roman Romanenko, and, NASA astronaut and Flight Engineer Tom Marshburn, Wednesday, Dec. 19, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hadfield, Romanenko and Marshburn on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 Commander Chris Hadfield of the Canadian Space Agency (CSA), left, Russian Flight Engineer Roman Romanenko of the Russian Federal Space Agency (Roscosmos), center, and NASA Flight Engineer Tom Marshburn sit in chairs outside the Soyuz Capsule just minutes after they landed in a remote area outside the town of Zhezkazgan, Kazakhstan, on Tuesday, May 14, 2013. Hadfield, Romanenko and Marshburn are returning from five months onboard the International Space Station where they served as members of the Expedition 34 and 35 crews. Photo Credit: (NASA/Carla Cioffi)

ISS035-E-020060 (15 April 2013) --- NASA astronaut Tom Marshburn works on the Inter Module Ventilation (IMV) Flow Measurement in Kibo Japanese Experiment Module (JEM)aboard the Earth-orbiting International Space Station. Expedition 35 Commander Chris Hadfield, an astronaut with the Canadian Space Agency, and Marshburn set up the velocicalc hardware and measured the IMV flow coming from the JEM Pressurized Module (JPM) IMV overhead aft inlet, starboard aft inlet, and starboard forward outlet. The measurements are part of routine preventative maintenance to ensure quality airflow in the modules.

ISS035-E-006230 (20 March 2013) --- Expedition 35 Commander Chris Hadfield in Harmony Node 2 aboard the Earth-orbiting International Space Station examines his work after reassembling the amine swing bed into its locker chassis. This device examines whether a vacuum-regenerated amine system can effectively remove carbon dioxide from the space station atmosphere using a smaller, more efficient vacuum regeneration system. The goal is to recover carbon dioxide from the atmosphere, and separate the dioxide from the carbon, so that the oxygen molecules can be used for crew life support.

A view of the International Space Station is seen from the Soyuz TMA-07M on the screen of the Russian Mission Control Center in Korolev, Russia as the spacecraft docks to the Poisk module, Friday, Dec. 19, 2012. The Soyuz TMA-07M with Expedition 34/35 crew members, NASA astronaut Tom Marshburn, Russian cosmonaut Roman Romanenko and Canadian astronaut Chris Hadfield launched from the Baikonur Cosmodrome in Kazakhstan two days earlier. The Soyuz crew members will be greeted by Expedition 34 Commander Kevin Ford of NASA and Russian Flight Engineers Oleg Novitskiy and Yevgeny Tarelkin, who have lived in the orbital laboratory since October. Photo Credit: (NASA/Carla Cioffi)

Newly arrived Expedition 34/35 crew members, Canadian Space Agency astronaut Chris Hadfield, front left, Russian cosmonaut Roman Romanenko, and NASA astronaut Tom Marshburn, front right, are seen on a screen at the Russian Mission Control Center in Korolev, Russia shortly after the three joined Expedition 34 Commander Kevin Ford of NASA, back left, and Flight Engineers Oleg Novitskiy and Yevgeny Tarelkin, back right, of Russia on Friday, Dec. 21, 2012. Photo Credit: (NASA/Carla Cioffi)

Expedition 34 NASA Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), top, NASA Flight Engineer Tom Marshburn and Soyuz Commander Roman Romanenko wave farewell from the bottom of the Soyuz rocket at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 19, 2012. Their Soyuz TMA-07M rocket launched at 6:12 p.m. local time. Photo Credit: (NASA/Carla Cioffi)

Russian backup crew member Fyodor Yurchikin, right, answers a reporter's question at a press conference held at the Cosmonaut Hotel, on Tuesday, Dec. 18, 2012, in Baikonur, Kazakhstan. Seen next to him are NASA backup crew member Karen Nyberg and Expedition 34/35 Canadian Space Agency astronaut Chris Hadfield. Photo Credit: (NASA/Carla Cioffi)

Quarantined Expedition 32 Canadian backup crewmember Chris Hadfield, right, answers reporters questions from behind glass during a prelaunch press conference held at the Cosmonaut Hotel on Friday, July 13, 2012 in Baikonur, Kazakhstan. Seated next to him is Expedition 32 Russian backup crewmember Roman Romanenko. Photo Credit (NASA/Carla Cioffi)

The crew of Space Shuttle mission STS-100 gathered in front of the shuttle Endeavour following landing at Edwards Air Force Base, California, 9:11 am, May 1, 2001. From left to right: John L. Phillips, mission specialist (U.S.); Umberto Guidoni, mission specialist (European Space Agency); Chris A. Hadfield, mission specialist (Canadian Space Agency); Jeffrey S. Ashby, pilot (U.S.); Kent V. Rominger, commander (U.S.); Yuri V. Lonchakov, mission specialist (Russia); Scott E. Prazynski, mission specialist (U.S.).

Expedition 34/35 prime crew members from left: Flight Engineer Tom Marshburn of NASA, Soyuz Commander Roman Romanenko, Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), and backup crew members NASA astronaut Karen Nyber, Russian cosmonaut Fyodor Yurchikin, and European Space Agency astronaut Luca Parmitano pose for a group photograph after the end of a press conference held at the Cosmonaut Hotel, on Tuesday, December 18, 2012, in Baikonur, Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 prime crew members from left: Flight Engineer Tom Marshburn of NASA, Soyuz Commander Roman Romanenko, Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), and backup crew members NASA astronaut Karen Nyber, Russian cosmonaut Fyodor Yurchikin, and European Space Agency astronaut Luca Parmitano are seen during a press conference held at the Cosmonaut Hotel, on Tuesday, December 18, 2012, in Baikonur, Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 33/34 astronauts onboard the International Space Station answer questions in a live downlink at a NASA Social exploring science on the ISS at NASA Headquarters, Wednesday, Feb. 20, 2013 in Washington. Seen from left to right are NASA astronauts Tom Marshburn, Kevin Ford and Canadian Space Agency (CSA) astronaut Chris Hadfield. Photo Credit: (NASA/Carla Cioffi)

A happy "thumbs up" from the crew of the Space Shuttle Endeavour and NASA Dryden Flight Research Center officials heralded the successful completion of mission STS-100. Standing by the shuttle's rocket nozzles from left to right: Scott E. Prazynski, mission specialist (U.S.); Yuri V. Lonchakov, mission specialist (Russia); Kent V. Rominger, commander (U.S.); Wally Sawyer, NASA Dryden Flight Research Center deputy director; Kevin Petersen, NASA Dryden Flight Research Center director; Umberto Guidoni, mission specialist (European Space Agency); John L. Phillips, mission specialist (U.S.); Jeffrey S. Ashby, pilot (U.S.); and Chris A. Hadfield, mission specialist (Canadian Space Agency). The mission landed at Edwards Air Force Base, California, on May 1, 2001.

Quarantined Expedition 32 prime crew members, from left, JAXA Flight Engineer Akihiko Hoshide, Russian Soyuz Commander Yuri Malenchenko, NASA Flight Engineer Sunita Williams, along with Expedition 32 backup few members, Tom Marshburn, Roman Romanenko and Chris Hadfield prepare to answer reporters questions from behind glass during a prelaunch press conference held at the Cosmonaut Hotel on Friday, July 13, 2012 in Baikonur, Kazakhstan. The launch of the Soyuz spacecraft with Malenchenko, Williams and Hoshide is scheduled for 8:40 a.m. local time on Sunday, July 15. Photo Credit (NASA/Carla Cioffi)

Quarantined Expedition 32 prime crew members, from left, JAXA Flight Engineer Akihiko Hoshide, Russian Soyuz Commander Yuri Malenchenko, NASA Flight Engineer Sunita Williams, along with Expedition 32 backup few members, Tom Marshburn, Roman Romanenko and Chris Hadfield pose for photograhers from behind glass during a prelaunch press conference held at the Cosmonaut Hotel on Friday, July 13, 2012 in Baikonur, Kazakhstan. The launch of the Soyuz spacecraft with Malenchenko, Williams and Hoshide is scheduled for 8:40 a.m. local time on Sunday, July 15. Photo Credit (NASA/Carla Cioffi)

Expedition 35 flight engineer Tom Marshburn gives commander Chris Hadfield a haircut (using clippers attached to a vacuum hose) in the Unity Node 1. Hadfield (a Canadian Space Agency astronaut) has a temperature sensor taped to his forehead.

ISS002-E-7013 (26 April 2001) --- Astronauts Scott E. Parazynski and Chris A. Hadfield, mission specialists, install the Interim Resistive Exercise Devise (IRED) in the Unity/Node 1. Hadfield represents the Canadian Space Agency (CSA). A digital still camera was used to record this image.

Expedition 35 commander Chris Hadfield and flight engineer Tom Marshburn (partially obscured) are photographed in the Poisk Mini-Research Module 2 (MRM2) during preparations for hatch opening with the docked Soyuz TMA-08M/34S spacecraft. Hadfield is a Canadian Space Agency (CSA) astronaut.

S95-12491 (8 June 1995) --- Canadian astronaut Chris A. Hadfield is seen during training at the Manipulator Development Facility (MDF) in the Systems Integration Facility at the Johnson Space Center (JSC). Hadfield will join four other NASA astronauts for the STS-74 mission aboard the Space Shuttle Atlantis later this year.

Expedition 35 flight engineer (FE) Tom Marshburn, FE Roman Romanenko, and commander Chris Hadfield pose for a photo in the SpaceX Dragon Commercial Resupply Services-2 (CRS-2) spacecraft. Romanenko is a Roscosmos cosmonaut and Hadfield is a Canadian Space Agency (CSA) astronaut.

View of Canadian Space Agency (CSA) Chris Hadfield,Expedition 34 Flight Engineer (FE),putting on tennis shoes,in the Node 3.

View of Chris Hadfield,Expedition 34 Flight Engineer (FE),floats near stowed Cargo Transfer Bags (CTBs). Photo was taken during Expedition 34.

View of Chris Hadfield,Expedition 34 Flight Engineer (FE), points to stowed food packets,in the Node 1. Photo was taken during Expedition 34.

Expedition 35 crewmembers pose for an in-flight portrait in the Kibo Japanese Experiment Pressurized Module (JPM). From left, are (front row) flight engineer (FE) Pavel Vinogradov, commander Chris Hadfield, FE Alexander Misurkin, (back row) FE Tom Marshburn, FE Chris Cassidy, and FE Roman Romanenko. Vinogradov, Misurkin and Romanenko are Roscosmos cosmonauts; Hadfield is a Canadian Space Agency (CSA) astronaut.

Expedition 35 commander and Canadian Space Agency astronaut Chris Hadfield (facing away from camera) poses for a photo in the Unity Node 1 after getting a haircut.

Expedition 35 (Soyuz 33S) crew member Chris Hadfield preparing for a T-38 flight. Photo Date: May 14, 2012. Location: Ellington Field - Hangar 276 - Tarmac. Photographer: Robert Markowitz

ISS034-E-031398 (18 Jan. 2013) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, works in the Kibo laboratory of the International Space Station.

View of Canadian Space Agency (CSA) Chris Hadfield,Expedition 34 Flight Engineer (FE) posing for photo in the U.S. Laboratory. Photo was taken during Expedition 34.

Date: 12-05-11 Location: Bldg 9NW, ISS Mockup Subject: Expedition 33 Soyuz crew Tom Marshburn and Chris Hadfield during their Emergency Scene training Photographer: James Blair

Expedition 35 (Soyuz 33S) crew member Chris Hadfield preparing for a T-38 flight. Photo Date: May 14, 2012. Location: Ellington Field - Hangar 276 - Tarmac. Photographer: Robert Markowitz

Expedition 35 commander and Canadian Space Agency (CSA) astronaut Chris Hadfield poses for a photo in the Unity Node 1. He is wearing a green shirt and bow tie in honor of St. Patrick's Day.

Date: 12-05-11 Location: Bldg 9NW, ISS Mockup Subject: Expedition 33 Soyuz crew Tom Marshburn and Chris Hadfield during their Emergency Scene training Photographer: James Blair

Date: 03-14-12 Location: NBL Subject: Expedition 35 (Soyuz 33S) crew members Tom Marshburn and Chris Hadfield during EVA training at the NBL. Photographer: James Blair

View of Canadian Space Agency (CSA) Chris Hadfield, Expedition 34 Flight Engineer (FE), using the Space Linear Acceleration Mass Measurement Device (SLAMMD) in the Columbus Module. Photo was taken during Expedition 34.

View of Canadian Space Agency (CSA) Chris Hadfield, Expedition 34 Flight Engineer (FE), in sleep station, in the Node 2. Photo was taken during Expedition 34.

Date: 12-05-11 Location: Bldg 9NW, ISS Mockup Subject: Expedition 33 Soyuz crew Tom Marshburn and Chris Hadfield during their Emergency Scene training Photographer: James Blair

View of Canadian Space Agency (CSA) Chris Hadfield,Expedition 34 Flight Engineer (FE),playing guitar in the Cupola Module. Photo was taken during Expedition 34.

Date: 03-14-12 Location: NBL Subject: Expedition 35 (Soyuz 33S) crew members Tom Marshburn and Chris Hadfield during EVA training at the NBL. Photographer: James Blair

View of Canadian Space Agency (CSA) Chris Hadfield,Expedition 34 Flight Engineer (FE),watching a water bubble float freely,showing his image refracted,in the Node 1. Photo was taken during Expedition 34.

Expedition 35 (Soyuz 33S) crew member Chris Hadfield preparing for a T-38 flight. Photo Date: May 14, 2012. Location: Ellington Field - Hangar 276 - Tarmac. Photographer: Robert Markowitz

Expedition 35 commander and Canadian Space Agency astronaut Chris Hadfield (facing away from camera) poses for a photo in the Unity Node 1 before getting a haircut.

Date: 12-05-11 Location: Bldg 17, Food Lab Subject: Expedition 34 Soyuz crew Tom Marshburn and Chris Hadfield during their food tasting Photographer: James Blair

Date: 12-05-11 Location: Bldg 9NW, ISS Mockup Subject: Expedition 33 Soyuz crew Tom Marshburn and Chris Hadfield during their Emergency Scene training Photographer: James Blair

Date: 12-05-11 Location: Bldg 9NW, ISS Mockup Subject: Expedition 33 Soyuz crew Tom Marshburn and Chris Hadfield during their Emergency Scene training Photographer: James Blair

Expedition 35 (Soyuz 33S) crew member Chris Hadfield preparing for a T-38 flight. Photo Date: May 14, 2012. Location: Ellington Field - Hangar 276 - Tarmac. Photographer: Robert Markowitz

Expedition 35 (Soyuz 33S) crew member Chris Hadfield preparing for a T-38 flight. Photo Date: May 14, 2012. Location: Ellington Field - Hangar 276 - Tarmac. Photographer: Robert Markowitz

Date: 12-05-11 Location: Bldg 17, Food Lab Subject: Expedition 34 Soyuz crew Tom Marshburn and Chris Hadfield during their food tasting Photographer: James Blair

Date: 12-05-11 Location: Bldg 9NW, ISS Mockup Subject: Expedition 33 Soyuz crew Tom Marshburn and Chris Hadfield during their Emergency Scene training Photographer: James Blair

ISS034-E-026550 (11 Jan. 2013) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, uses the advanced Resistive Exercise Device (aRED) to exercise in the Tranquility node of the International Space Station.

ISS034-E-051715 (20 Feb. 2013) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, performs routine maintenance on Biolab in the Columbus Module aboard the International Space Station.

ISS034-E-029995 (15 Jan. 2013) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, moves a stowage container in the Destiny laboratory of the International Space Station.

ISS035-E-016639 (7 April 2013) --- Expedition 35 Flight Engineer Tom Marshburn fills the role of barber for Commander Chris Hadfield in the Unity node of the Earth-orbiting International Space Station.

Date: 03-14-12 Location: NBL Subject: Expedition 35 (Soyuz 33S) crew members Tom Marshburn and Chris Hadfield during EVA training at the NBL. Photographer: James Blair

Date: 03-14-12 Location: NBL Subject: Expedition 35 (Soyuz 33S) crew members Tom Marshburn and Chris Hadfield during EVA training at the NBL. Photographer: James Blair

Date: 12-05-11 Location: Bldg 9NW, ISS Mockup Subject: Expedition 33 Soyuz crew Tom Marshburn and Chris Hadfield during their Emergency Scene training Photographer: James Blair

Date: 03-14-12 Location: NBL Subject: Expedition 35 (Soyuz 33S) crew members Tom Marshburn and Chris Hadfield during EVA training at the NBL. Photographer: James Blair

ISS034-E-027234 (7 Jan. 2013) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, uses a camera to photograph the topography of a point on Earth from a window in the Cupola of the International Space Station.

ISS034-E-010866 (31 Dec. 2012) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, floats freely in the Unity node of the International Space Station.

ISS034-E-027319 (10 Jan. 2013) --- Canadian Space Agency astronaut Chris Hadfield, Expedition 34 flight engineer, looks through windows while working controls at a robotic workstation in the Cupola of the International Space Station.

Expedition 35 (Soyuz 33S) crew member Chris Hadfield preparing for a T-38 flight. Photo Date: May 14, 2012. Location: Ellington Field - Hangar 276 - Tarmac. Photographer: Robert Markowitz