iss044e005118 (6/26/2015) --- Cosmonaut Gennady Padalka in the U.S. Laboratory in the process of aligning the Observation Analysis of Smectic Islands in Space (OASIS) Macro Camera. The Observation and Analysis of Smectic Islands In Space (OASIS) studies the unique behavior of liquid crystals in microgravity, including their overall motion and the merging of crystal layers known as smectic islands. Liquid crystals are used for display screens in televisions and clocks, and they also occur in soaps and in cell membranes. The experiment allows detailed studies of the behavior of these structures, and how microgravity affects their unique ability to act like both a liquid and a solid crystal.

ISS031-E-081649 (17 May 2012) --- Russian cosmonauts Gennady Padalka (background) and Sergei Revin, both Expedition 31 flight engineers, are pictured in the Harmony node of the International Space Station shortly after Padalka, Revin and NASA astronaut Joe Acaba (not pictured) docked with the space station in their Soyuz TMA-04M spacecraft.

iss043e308120 (4/25/2015) --- Russian cosmonaut G.I. Padalka, Expedition 43 flight engineer, equipped with a bungee harness, exercises on the Treadmill Vibration Isolation System (TVIS) (БД-2 / BD-2) in the Zvezda Service Module of the International Space Station.

ISS020-E-005067 (30 May 2009) --- Cosmonaut Gennady Padalka, Expedition 20 commander, is pictured near two beverage containers floating freely in the Destiny laboratory of the International Space Station.

ISS020-E-014687 (26 June 2009) --- Cosmonaut Gennady Padalka, Expedition 20 commander, wears communication headgear while using a computer in the Harmony node of the International Space Station.

ISS019-E-011053 (27 April 2009) --- Cosmonaut Gennady Padalka, Expedition 19/20 commander, exercises using the advanced Resistive Exercise Device (aRED) in the Unity node of the International Space Station.

ISS020-E-006215 (1 June 2009) --- Cosmonaut Gennady Padalka (foreground), Expedition 20 commander; and cosmonaut Roman Romanenko, flight engineer, use still cameras at windows in the Zvezda Service Module of the International Space Station.

ISS031-E-081658 (17 May 2012) --- Russian cosmonaut Gennady Padalka (background) and NASA astronaut Joe Acaba, both Expedition 31 flight engineers, are pictured during a crew safety briefing in the Columbus laboratory to familiarize them with the potential hazards and available safety measures onboard the International Space Station. Russian cosmonaut Oleg Kononenko (mostly out of frame at left), commander, conducted the briefing. Out of frame are European Space Agency astronaut Andre Kuipers, NASA astronaut Don Pettit and Russian cosmonaut Sergei Revin, all flight engineers. The event took place shortly after Padalka, Revin and Acaba docked with the space station in their Soyuz TMA-04M spacecraft.

ISS031-E-157809 (22 May 2012) --- Russian cosmonaut Sergei Revin (foreground), Expedition 31 flight engineer, enters data in a computer in the Zvezda Service Module of the International Space Station while Russian cosmonaut Gennady Padalka, flight engineer, looks on.

ISS019-E-007123 (12 April 2009) --- Cosmonaut Gennady Padalka (foreground), Expedition 19/20 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, Expedition 19/20 flight engineer, work in the Zvezda Service Module of the International Space Station.

ISS020-E-017404 (6 July 2009) --- Cosmonaut Gennady Padalka (right), Expedition 20 commander; and NASA astronaut Michael Barratt, flight engineer, appear to be hanging upside down as they use still cameras in the Kibo laboratory of the International Space Station.

ISS020-E-017397 (6 July 2009) --- Cosmonaut Gennady Padalka (left), Expedition 20 commander; and NASA astronaut Michael Barratt, flight engineer, appear to be hanging upside down as they use still cameras in the Kibo laboratory of the International Space Station.

ISS019-E-010120 (26 April 2009) --- Cosmonaut Gennady Padalka, Expedition 19/20 commander, exercises using the advanced Resistive Exercise Device (aRED) in the Unity node of the International Space Station.

ISS020-E-031551 (18 Aug. 2009) --- Cosmonaut Gennady Padalka (right), Expedition 20 commander; and European Space Agency astronaut Frank De Winne, flight engineer, are pictured in the Harmony node of the International Space Station.

S127-E-007430 (21 July 2009) --- Astronaut Mark Polansky (right) and Russian Federal Space Agency cosmonaut Gennady Padalka take a break from a busy agenda onboard the International Space Station on the eve of the third of five spacewalks scheduled as part of more than a week's worth of joint activities for Endeavour and ISS crewmembers. Polansky is STS-127 commander, and Padalka is the station commander.

S127-E-007453 (21 July 2009) --- Astronaut Mark Polansky (left) and Russian Federal Space Agency cosmonaut Gennady Padalka take a break from a busy agenda onboard the International Space Station on the eve of the third of five spacewalks scheduled as part of more than a week's worth of joint activities for Endeavour and ISS crewmembers. Polansky is STS-127 commander, and Padalka is the station commander.

ISS019-E-008933 (19 April 2009) --- Cosmonaut Padalka Gennady (left), Expedition 19/20 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, flight engineer, use still cameras at a window in the Zvezda Service Module of the International Space Station.

ISS020-E-005066 (30 May 2009) --- Cosmonaut Gennady Padalka (left), Expedition 20 commander; along with cosmonaut Roman Romanenko (center) and Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, both flight engineers, are pictured in the Destiny laboratory of the International Space Station.

Expedition 19 Commander Gennady I. Padalka answers questions from behind glass during a press conference on Wednesday, March 25, 2009 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

ISS019-E-016485 (13 May 2009) --- Cosmonaut Gennady Padalka, Expedition 19/20 commander, photographs a plant experiment in the Zvezda Service Module of the International Space Station.

ISS031-E-081644 (17 May 2012) --- Russian cosmonaut Oleg Kononenko (left), Expedition 31 commander, conducts a crew safety briefing in the Destiny laboratory of the International Space Station shortly after Russian cosmonauts Gennady Padalka (center) and Sergei Revin (out of frame); along with NASA astronaut Joe Acaba (not pictured) docked with the space station in their Soyuz TMA-04M spacecraft. NASA astronaut Don Pettit, flight engineer, is at right.

ISS020-E-016872 (2 July 2009) --- Cosmonaut Gennady Padalka, Expedition 20 commander, is pictured in a hatch on the Soyuz TMA-14 spacecraft during preparations for the relocation of the Soyuz from the Zvezda Service Module’s aft port to the Pirs Docking Compartment of the International Space Station.

Expedition 32 Russian cosmonaut Sergei Revin, center, is welcomed to Kostanay, Kazakhstan after he and Expedition 32 Commander Gennady Padalka and NASA Flight Engineer Joe Acaba returned from the International Space Station on Monday, Sept. 17, 2012. Revin, Padalka and Padalka returned from five months onboard the International Space Station where they served as members of the Expedition 31 and 32 crews. Photo Credit: (NASA/Carla Cioffi)

ISS008-E-22247 (23 April 2004) --- Cosmonaut Gennady I. Padalka (left), Expedition 9 commander, and astronaut Edward M. (Mike) Fincke, NASA ISS science officer and flight engineer, pose for a crew photo in the Destiny laboratory of the International Space Station (ISS). Padalka represents Russia’s Federal Space Agency.

PHOTO DATE:11-06-08 LOCATION: NBL SUBJECT: Expedition 19 crew members Mike Barratt and Gennady Padalka during EVA training at the NBL PHOTOGRAPHER: BILL STAFFORD X34753

PHOTO DATE:11-06-08 LOCATION: NBL SUBJECT: Expedition 19 crew members Mike Barratt and Gennady Padalka during EVA training at the NBL PHOTOGRAPHER: BILL STAFFORD X34753

ISS008-E-22362 (28 April 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, works in the Unity node of the International Space Station (ISS).

ISS008-E-22363 (28 April 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, works in the Unity node of the International Space Station (ISS).

Expedition 9 Commander Gennady Padalka, right, and Flight Engineer and NASA Science Officer Mike Fincke check each other's suits, Monday, April 19, 2004, prior to departing for the launch pad for their liftoff to the International Space Station April 19, 2004 from the Baikonur Cosmodrome in Baikonur, Kazakhstan. Padalka and Fincke launched with European Space Agency Astronaut Andre Kuipers of the Netherlands, who will spend 9 days on the Station, while Padalka and Fincke will remain on board until October. Photo Credit: (NASA/Bill Ingalls)

Spaceflight Participant Charles Simonyi, left, Expedition 19 Commander Gennady I. Padalka, center, and Flight Engineer Michael R. Barratt are seen in quarantine behind glass during the State Commission meeting on Wednesday, March 25, 2009 in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Expedition 19 Commander Gennady I. Padalka, left, and Flight Engineer Michael R. Barratt are seen in quarantine behind glass during the State Commission meeting on Wednesday, March 25, 2009 in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Expedition 19 Commander Gennady I. Padalka, left, and Flight Engineer Michael R. Barratt answer questions from behind glass during a press conference on Wednesday, March 25, 2009 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Spaceflight Participant Charles Simonyi, left, Expedition 19 Commander Gennady I. Padalka, center, and Flight Engineer Michael R. Barratt are seen in quarantine behind glass as they pose for photographs on Wednesday, March 25, 2009 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Spaceflight Participant Charles Simonyi, left, Expedition 19 Commander Gennady I. Padalka, center, and Flight Engineer Michael R. Barratt answer questions from behind glass during a press conference on Wednesday, March 25, 2009 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

ISS020-E-016896 (2 July 2009) --- Cosmonaut Gennady Padalka, Expedition 20 commander, attired in a Russian Sokol launch and entry suit, occupies his seat in the Soyuz TMA-14 during final preparations for the relocation of the Soyuz from the Zvezda Service Module’s aft port to the Pirs Docking Compartment of the International Space Station.

ISS020-E-016890 (2 July 2009) --- Cosmonaut Gennady Padalka, Expedition 20 commander, attired in a Russian Sokol launch and entry suit, occupies his seat in the Soyuz TMA-14 during final preparations for the relocation of the Soyuz from the Zvezda Service Module’s aft port to the Pirs Docking Compartment of the International Space Station.

ISS020-E-016893 (2 July 2009) --- Attired in Russian Sokol launch and entry suits, cosmonaut Gennady Padalka (right), Expedition 20 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, flight engineer, occupy their seats in the Soyuz TMA-14 during final preparations for the relocation of the Soyuz from the Zvezda Service Module’s aft port to the Pirs Docking Compartment of the International Space Station.

Quarantined Expedition 31 Soyuz Commander Gennady Padalka answers reporters questions from behind glass during a prelaunch press conference held at the Cosmonaut Hotel on Monday, May 14, 2012 in Baikonur, Kazakhstan. The launch of the Soyuz spacecraft with Padalka, Flight Engineer Sergei Revin of Russia, and prime NASA Flight Engineer Joe Acaba is scheduled for 9:01 a.m. local time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

Russian Cosmonaut Gennady Padalka, left, NASA Astronaut Peggy Whitson, center, and Russian Cosmonaut Valery Korzun are seen in traditional Kazakh dress during a ceremony where they were recognized for their achievements in space flight on Thursday, Sept. 23, 2010 in Jhezkazgan, Kazakhstan. Padalka, Whitson, and Korzun were in Jhezkazgan in preparation for the Expedition 24 Soyuz TMA-18 spacecraft landing. Photo Credit: (NASA/Bill Ingalls)

Expedition 31 Soyuz Commander Gennady Padalka continues the traditional of signing one of the doors at the Cosmonaut Hotel on Tuesday, May 15, 2012 in Baikonur, Kazakhstan. The Soyuz spacecraft with Padalka, Flight Engineer Sergei Revin of Russia, and NASA Flight Engineer Joe Acaba aboard launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

A Kazakh singer performs during a ceremony in which NASA Astronaut Peggy Whitson, and Russian Cosmonauts Valery Korzun and Gennady Padalka were recognized for their achievements in space flight on Thursday, Sept. 23, 2010 in Jhezkazgan, Kazakhstan. Whitson, Korzun and Padalka were in Jhezkazgan in preparation for the Expedition 24 Soyuz TMA-18 spacecraft landing. Photo Credit: (NASA/Bill Ingalls)

Expedition 9 Commander Gennady Padalka is carried in a chair from the landing site to the medical tent in order to remove his sokol suit. Padalka landed in the Soyuz capsule along with Expedition 9 Flight Engineer Michael Fincke and Russian Space Forces cosmonaut Yuri Shargin. The crew landed in their Soyuz capsule approximately 85 kilometers northeast of Arkalyk in northern Kazakhstan, Sunday, October 24, 2004. Photo Credit: (NASA/Bill Ingalls)

ISS009-E-06431 (10 May 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, performs a suit check on the Russian Orlan spacesuit in the Unity node of the International Space Station (ISS).

ISS009-E-18566 (15 August 2004) --- Cosmonaut Gennady I. Padalka (left), Expedition 9 commander representing Russia’s Federal Space Agency, and astronaut Edward M. (Mike) Fincke, NASA ISS science officer and flight engineer, pose for a photo in the Unity node of the International Space Station (ISS).

ISS009-E-18540 (14 August 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, holds the Progress 15 supply vehicle probe-and-cone docking mechanism in the Zvezda Service Module of the International Space Station (ISS).

ISS009-E-13383 (28 June 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, uses a communication system in the Zvezda Service Module of the International Space Station (ISS).

ISS009-E-06429 (10 May 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, performs a suit check on the Russian Orlan spacesuit in the Unity node of the International Space Station (ISS).

ISS009-E-06428 (10 May 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, uses a computer in the Unity node of the International Space Station (ISS). A Russian Orlan spacesuit is visible in the foreground.

ISS009-E-10906 (9 June 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, is pictured with his Russian Orlan spacesuit in the Pirs Docking Compartment of the International Space Station (ISS). Extravehicular activity (EVA) is scheduled for June 24.

ISS009-E-08880 (27 May 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, is pictured near fresh fruit floating freely in the Zvezda Service Module of the International Space Station (ISS).

Expedition 9 Commander Gennady Padalka trains on a Soyuz simulator at the Cosmonaut Hotel, Thursday, April 15, 2004, in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Expedition 19 Commander Gennady I. Padalka, plays table tennis at the Cosmonaut Hotel, Saturday, March 21, 2009 in Baikonur, Kazakhstan. (Photo Credit: NASA/Bill Ingalls)

ISS008-E-22137 (24 April 2004) --- Cosmonaut Gennady I. Padalka (foreground), Expedition 9 commander, and astronaut Edward M. (Mike) Fincke, NASA ISS science officer and flight engineer, participate in a familiarization session with the Mobile Service System (MSS) and hands-on experience with the Canadarm2, or Space Station Remote Manipulator System (SSRMS) in the Destiny laboratory of the International Space Station (ISS). Padalka represents Russia’s Federal Space Agency.

ISS009-E-08832 (27 May 2004) --- Cosmonaut Gennady I. Padalka (background), Expedition 9 commander representing Russia’s Federal Space Agency, works at the Simvol-Ts workstation in the Zvezda Service Module of the International Space Station (ISS) during the docking approach of the Progress 14 spacecraft. Astronaut Edward M. (Mike) Fincke, NASA ISS science officer and flight engineer, assisted Padalka.

ISS009-E-05255 (1 May 2004) --- Cosmonaut Gennady I. Padalka (right), Expedition 9 commander representing Russia’s Federal Space Agency, looks over a procedures checklist near the Space Station Remote Manipulator System (SSRMS) or Canadarm2 workstation as he talks into a communication system in the Destiny laboratory on the International Space Station (ISS). Astronaut Edward M. (Mike) Fincke, NASA ISS science officer and flight engineer, assisted Padalka.

ISS008-E-22249 (23 April 2004) --- Cosmonaut Gennady I. Padalka (left), Expedition 9 commander; astronaut Edward M. (Mike) Fincke, NASA ISS science officer and flight engineer; and European Space Agency (ESA) astronaut Andre Kuipers of the Netherlands pose for a group photo in the Destiny laboratory of the International Space Station (ISS). Padalka represents Russia’s Federal Space Agency.

ISS008-E-22002 (22 April 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander, spins a box of chocolates as cosmonaut Alexander Y. Kaleri, Expedition 8 flight engineer, looks on in the Zvezda Service Module on the International Space Station (ISS). Padalka and Kaleri represent Russia’s Federal Space Agency.

ISS008-E-21991 (22 April 2004) --- Cosmonaut Gennady I. Padalka (left), Expedition 9 commander, and European Space Agency (ESA) astronaut Andre Kuipers of the Netherlands, work with one of experiments of the Dutch Expedition for Life Science, Technology and Atmospheric (DELTA) Research in the Unity node of the International Space Station (ISS). Padalka represents Russia’s Federal Space Agency.

Expedition 43 Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) talks with an instructor during an Soyuz TMA-16M Trajectory and Flight Plan briefing, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Padalka, Russian Cosmonaut Mikhail Kornienko of Roscosmos and NASA Astronaut Scott Kelly are preparing for launch to the International Space Station in their Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) gets his hair cut at the Cosmonaut Hotel, on Wednesday, March 25, 2015, at the Baikonur Cosmodrome in Kazakhstan. Gennady Padalka, NASA Astronaut Scott Kelly, and Russian Cosmonaut Mikhail Kornienko are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) talks with an instructor during an Soyuz TMA-16M Trajectory and Flight Plan briefing, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Padalka, Russian Cosmonaut Mikhail Kornienko of Roscosmos and NASA Astronaut Scott Kelly are preparing for launch to the International Space Station in their Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonauts Gennady Padalka, left, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) take part the tilt table training during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Padalka, Kornienko, and Expedition 43 NASA Astronaut Scott Kelly are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) plays badminton during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Padalka, fellow Russian Cosmonaut Mikhail Kornienko of Roscosmos, and NASA Astronaut Scott Kelly are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonauts Gennady Padalka, left, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) take part the tilt table training during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Padalka, Kornienko, and Expedition 43 NASA Astronaut Scott Kelly are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) gets his hair cut at the Cosmonaut Hotel, on Wednesday, March 25, 2015, at the Baikonur Cosmodrome in Kazakhstan. Gennady Padalka, NASA Astronaut Scott Kelly, and Russian Cosmonaut Mikhail Kornienko are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 20 Commander Gennady Padalka is carried in a chair to the medical tent shortly after he and Spaceflight participant Guy Laliberté, and Expedition 20 Flight Engineer Michael Barratt landed in their Soyuz TMA-14 capsule near the town of Arkalyk, Kazakhstan on Sunday, Oct. 11, 2009. Padalka and Barratt are returning from six months onboard the International Space Station, along with Laliberté who arrived at the station on Oct. 2 with Expedition 21 Flight Engineers Jeff Williams and Maxim Suraev aboard the Soyuz TMA-16 spacecraft. Photo Credit: (NASA/Bill Ingalls)

Gagarin Cosmonaut Training Center (GCTC) Flight Surgeon Alexey Grishin, left, and Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) play a game of chess during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Padalka, fellow Russian Cosmonaut Mikhail Kornienko of Roscosmos, and NASA Astronaut Scott Kelly are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos) gets his hair cut at the Cosmonaut Hotel, on Wednesday, March 25, 2015, at the Baikonur Cosmodrome in Kazakhstan. Gennady Padalka, NASA Astronaut Scott Kelly, and Russian Cosmonaut Mikhail Kornienko are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

All six Expedition 43 crewmembers are gathered in the Destiny laboratory on board the International Space Station on Mar 30, 2015 after an emergency procedures training period. The six members include Russian cosmonauts Mikhail Kornienko, Anton Shkaplerov, Gennady Padalka, NASA Astronaut Scott Kelly, ESA (European Space Agency) astronaut Samantha Cristoforetti, and Expedition 43 commander US astronaut Terry Virts.

NASA astronaut Terry Virts, Commander of Expedition 43 on the International Space Station, is seen here recording a special message for a science conference along with his crewmates cosmonaut Mikhail Kornienko, Russian Federal Space Agency (ROSCOSMOS), ESA (European Space Agency) astronaut Samantha Cristoforetti, NASA Astronaut Scott Kelly (bottom left), Russian cosmonauts, Anton Shkaplerov, and Gennady Padalka (ROSCOSMOS).

NASA astronaut Terry Virts, Commander of Expedition 43 on the International Space Station, is seen here recording a special message for a science conference along with his crewmates cosmonaut Mikhail Kornienko, Russian Federal Space Agency (ROSCOSMOS), ESA (European Space Agency) astronaut Samantha Cristoforetti, NASA Astronaut Scott Kelly (bottom left), Russian cosmonauts, Anton Shkaplerov, and Gennady Padalka (ROSCOSMOS).

ISS043E069815 (03/30/2015) --- All six Expedition 43 crewmembers are gathered in the Destiny laboratory on board the International Space Station on Mar 30, 2015 after an emergency procedures training period. The six members include Russian cosmonauts Mikhail Kornienko (top left), Anton Shkaplerov, Gennady Padalka, NASA Astronaut Scott Kelly, ESA (European Space Agency) astronaut Samantha Cristoforetti (bottom left), and Expedition 43 commander US astronaut Terry Virts.

Expedition 31 crew members Joe Acaba, left, Commander Gennady Padalka and Sergei Revin, right, receive the traditional blessing by an Orthodox priest at the Cosmonaut Hotel on Tuesday, May 15, 2012 in Baikonur, Kazakhstan. The Soyuz spacecraft with Expedition 31 Soyuz Commander Gennady Padalka, Flight Engineer Sergei Revin, and NASA Flight Engineer Joe Acaba aboard launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

Expedition 31 Soyuz Commander Gennady Padalka smiles after having his Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, Flight Engineer Sergei Revin, and Expedition 31 Flight Engineer Joe Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 31 NASA flight engineer Joe Acaba, right, and Soyuz Commander Gennady Padalka enter a mockup Soyuz TMA spacecraft in order to perform final qualification tests in preparation for flight, Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Acaba, Padalka and flight engineer Sergei Revin are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 NASA flight engineer Joe Acaba, left, Soyuz Commander Gennady Padalka and flight engineer Sergei Revin, third from left, stand at attention before senior officials for their final qualification test in preparation for flight, Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Acaba, Padalka and Revin are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 NASA flight engineer Joe Acaba, entering capsule, and Soyuz Commander Gennady Padalka enter a mockup Soyuz TMA spacecraft in order to perform final qualification tests in preparation for flight, Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Acaba, Padalka and flight engineer Sergei Revin are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 NASA flight engineer Joe Acaba, right, flight engineer Sergei Revin and Soyuz Commander Gennady Padalka enter a mockup Soyuz TMA spacecraft in order to perform final qualification tests in preparation for flight, Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Acaba, Revin and Padalka are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 NASA flight engineer Joe Acaba, Soyuz Commander Gennady Padalka and flight engineer Sergei Revin pose for photos before their final qualification test in preparation for flight, Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Acaba, Padalka and Revin are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 Soyuz Commander Gennady Padalka signs for his Soyuz vehicle simulation test card before senior officials at the Gagarin Cosmonaut Training Center, Tuesday, April 24, 2012 in Star City, Russia, while his fellow crew members NASA flight engineer Joe Acaba, left, and flight engineer Sergei Revin look on. Padalka, Acaba and Revin are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 NASA flight engineer Joe Acaba signs for his Soyuz vehicle simulation test card before senior officials at the Gagarin Cosmonaut Training Center, Tuesday, April 24, 2012 in Star City, Russia, while his fellow crew members Soyuz Commander Gennady Padalka, left, and flight engineer Sergei Revin look on. Acaba, Padalka and Revin are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 Soyuz Commander Gennady Padalka has his Russian Sokol suit pressure checked in preparation for his launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, Flight Engineer Sergei Revin and Flight Engineer Joe Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 31 NASA flight engineer Joe Acaba, left, Soyuz Commander Gennady Padalka and flight engineer Sergei Revin, third from left, stand at attention before senior officials for their final qualification test in preparation for flight, Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Acaba, Padalka and Revin are set to launch to the International Space Station May 15 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

DATE: 10-17-11 LOCATION: Building 9 - ISS Trainers SUBJECT: Expedition 31/32 crew—Padalka, Revin and Acaba—during some of their Emergency Scenarios training. PHOTOGRAPHER: Lauren Harnett

DATE: 10-17-11 LOCATION: Building 9 - ISS Trainers SUBJECT: Expedition 31/32 crew—Padalka, Revin and Acaba—during some of their Emergency Scenarios training. PHOTOGRAPHER: Lauren Harnett

DATE: 10-17-11 LOCATION: Building 9 - ISS Trainers SUBJECT: Expedition 31/32 crew—Padalka, Revin and Acaba—during some of their Emergency Scenarios training. PHOTOGRAPHER: Lauren Harnett

DATE: 10-17-11 LOCATION: Building 9 - ISS Trainers SUBJECT: Expedition 31/32 crew—Padalka, Revin and Acaba—during some of their Emergency Scenarios training. PHOTOGRAPHER: Lauren Harnett

DATE: 10-17-11 LOCATION: Building 9 - ISS Trainers SUBJECT: Expedition 31/32 crew—Padalka, Revin and Acaba—during some of their Emergency Scenarios training. PHOTOGRAPHER: Lauren Harnett

DATE: 10-17-11 LOCATION: Building 9 - ISS Trainers SUBJECT: Expedition 31/32 crew—Padalka, Revin and Acaba—during some of their Emergency Scenarios training. PHOTOGRAPHER: Lauren Harnett

DATE: 10-17-11 LOCATION: Building 9 - ISS Trainers SUBJECT: Expedition 31/32 crew—Padalka, Revin and Acaba—during some of their Emergency Scenarios training. PHOTOGRAPHER: Lauren Harnett

ISS008-E-22135 (24 April 2004) --- Cosmonaut Gennady I. Padalka, Expedition 9 commander representing Russia’s Federal Space Agency, floats in the Destiny laboratory of the International Space Station (ISS).

ISS008-E-21996 (22 April 2004) --- Cosmonaut Gennady I. Padalka (left), Expedition 9 commander, and European Space Agency (ESA) astronaut Andre Kuipers of the Netherlands, look over a procedures checklist for the Dutch Expedition for Life Science, Technology and Atmospheric (DELTA) Research in the Unity node of the International Space Station (ISS). Astronaut C. Michael Foale (right), Expedition 8 commander and NASA ISS science officer, exercises using the Interim Resistive Exercise Device (IRED) equipment. Padalka represents Russia’s Federal Space Agency.

ISS008-E-21992 (22 April 2004) --- Cosmonaut Gennady I. Padalka (left), Expedition 9 commander, and European Space Agency (ESA) astronaut Andre Kuipers of the Netherlands, look over a procedures checklist for the Dutch Expedition for Life Science, Technology and Atmospheric (DELTA) Research in the Unity node of the International Space Station (ISS). Astronaut C. Michael Foale (right), Expedition 8 commander and NASA ISS science officer, exercises using the Interim Resistive Exercise Device (IRED) equipment. Padalka represents Russia’s Federal Space Agency.

Expedition 19 Commander Gennady I. Padalka is seen through a quarantine windowed room as he and other crew memebers participate in Soyuz rendezvous and docking training at the Cosmonaut Hotel, Saturday, March 21, 2009 in Baikonur, Kazakhstan. (Photo Credit: NASA/Bill Ingalls)

Expedition 19 Commander Gennady I. Padalka, left, and Spaceflight Participant Charles Simonyi exercise at the Cosmonaut Hotel, Saturday, March 21, 2009 in Baikonur, Kazakhstan. (Photo Credit: NASA/Bill Ingalls)

ISS009-E-08833 (27 May 2004) --- Cosmonaut Gennady I. Padalka (background), Expedition 9 commander representing Russia’s Federal Space Agency, works at the Simvol-Ts workstation in the Zvezda Service Module of the International Space Station (ISS) during the docking approach of the Progress 14 spacecraft. Astronaut Edward M. (Mike) Fincke, NASA ISS science officer and flight engineer, assisted Padalka.

Media document Expedition 43 NASA Astronaut Scott Kelly, seated left, Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) as they work on Soyuz training, Saturday, March 21, 2015 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Padalka, and Kornienko are preparing for launch to the International Space Station in their Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) pose for a group photo near a model of the Soyuz rocket during media day, Saturday, March 21, 2015 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Padalka, and Kornienko are preparing for launch to the International Space Station in their Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) take in the view from a overlook during media day, Saturday, March 21, 2015 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Padalka, and Kornienko are preparing for launch to the International Space Station in their Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (March 27 Eastern time.) As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Bill Ingalls)

Expedition 31 NASA Flight Engineer Joe Acaba, far left, Expedition 31 Soyuz Commander Gennady Padalka and Flight Engineer Sergei Revin, third from left, select International Space Station Russian segment event simulation test cards for their final qualification test in preparation for launch, Monday, April 23, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Padalka, Acaba and Revin are set to launch May 15 from the Baikonur Cosmodrome in their Soyuz TMA-04M spacecraft to the International Space Station. Photo Credit: (NASA/Carla Cioffi)