Media document Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), left, and NASA Astronaut Scott Kelly, right, as they play billiards during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Kelly, and Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of Roscosmos 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 23 Flight Engineer Mikhail Kornienko answers a reporters' question during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Thursday, April 1, 2010. The launch of the Soyuz spacecraft with Expedition 23 NASA Flight Engineer Mikhail Kornienko, Soyuz Commander Alexander Skvortsov and Flight Engineer Tracy Caldwell Dyson is scheduled for Friday, April 2, 2010 at 10:04 a.m. Kazakhstan time. Photo Credit: (NASA/Bill Ingalls)

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

Expedition 43 Russian Cosmonaut Mikhail Kornienko 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. Kornienko, NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka 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 NASA Astronaut Scott Kelly, left, and Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) pose for a photo near a model of the Soyuz rocket during media day, Saturday, March 21, 2015 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Kornienko, and Russian Cosmonaut Gennady Padalka of Roscosmos 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 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) plays pool with NASA Astronaut Scott Kelly at the Cosmonaut Hotel, Thursday, March 19, 2015 in Baikonur, Kazakhstan. Kelly, Kornienko, and Russian Cosmonaut Gennady Padalka 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) plays pool with NASA Astronaut Scott Kelly at the Cosmonaut Hotel, Thursday, March 19, 2015 in Baikonur, Kazakhstan. Kelly, Kornienko, and Russian Cosmonaut Gennady Padalka 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), left, shows his One-Year and Expedition 43 mission patches to members of the press during media day, Saturday, March 21, 2015 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kornienko, NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka of Roscosmos 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 Mikhail Kornienko 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. Kornienko, NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka 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)

Gagarin Cosmonaut Training Center (GCTC) Flight Surgeon Alexey Grishin, left, and Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) walk from morning classes at the Cosmonaut Hotel to the crew quarters at the Zvjozdnyj Hotel, Thursday, March 19, 2015 in Baikonur, Kazakhstan. Kornienko, Russian Cosmonaut Gennady Padalka of Roscosmos, and NASA Astoronaut 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 24 Flight Engineer Mikhail Kornienko, embraces his family after he and Expedition 24 Commander Alexander Skvortsov arrived at Chkalovskaya airport just outside Moscow on Saturday, Sept. 25, 2010. Skvortsov, Kornienko and Expedition 24 Flight Engineer Tracy Caldwell Dyson, landed in their Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

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

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 NASA Astronaut Scott Kelly, left in mirror, and Russian Cosmonaut Mikhail Kornienko, of the Russian Federal Space Agency (Roscosmos) are seen exercising during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Kornienko, Kelly and Russian Cosmonaut Gennady Padalka of Roscosmos 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 Ingall

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

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), left, relaxes with staff at the Cosmonaut Hotel, Thursday, March 19, 2015 in Baikonur, Kazakhstan. Kornienko, fellow Russian Cosmonaut Gennady Padalka, 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) takes a break between classes to make a phone call, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Kornienko, NASA Astronaut Scott Kelly and Russian Cosmonaut Gennady Padalka of Roscosmos 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) plays pool with NASA Astronaut Scott Kelly at the Cosmonaut Hotel, Thursday, March 19, 2015 in Baikonur, Kazakhstan. Kelly, Kornienko, and Russian Cosmonaut Gennady Padalka 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 24 Flight Engineer Mikhail Kornienko is helped out of the Soyuz TMA-18 spacecraft shortly after landing with fellow crew members Commander Alexander Skvortsov and Tracy Caldwell Dyson near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

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

Expedition 23 Flight Engineer Mikhail Kornienko says a few words during the State Commission meeting to approve the Soyuz launch of Kornienko, Expedition 23 Soyuz Commander Alexander Skvortsov and Expedition 23 Flight Engineer Tracy Caldwell Dyson on Thursday, April 1, 2010 in Baikonur, Kazakhstan. The crew is kept in a separate room with a glass window in order to help maintain their health. Photo Credit: (NASA/Bill Ingalls)

Russian cosmonaut Expedition 23 Flight Engineer Mikhail Kornienko smiles as he awaits to have his Sokol suit pressure checked prior to launch, Friday, April 2, 2010, in Baikonur, Kazakhstan. Kornienko and fellow Expedition 23 crew members Soyuz Commander Alexander Skvortsov and NASA Flight Engineer Tracy Caldwell Dyson launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. 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) are welcomed by officials after arriving in Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio 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/Victor Zelentsov)

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

Expedition 23 crew members, from left, NASA’s Tracy Caldwell Dyson, Russian Alexander Skvortsov and Russian Mikhail Kornienko pose for photographers during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan, Thursday, April 1, 2010. The launch of the Soyuz spacecraft with Expedition 23 NASA Flight Engineer Tracy Caldwell Dyson, Soyuz Commander Alexander Skvortsov and Flight Engineer Mikhail Kornienko is scheduled for Friday, April 2, 2010 at 10:04 a.m. Kazakhstan time. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 crew members, from left, NASA’s Tracy Caldwell Dyson, Russian Alexander Skvortsov and Russian Mikhail Kornienko are seen during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan, Thursday, April 1, 2010. The launch of the Soyuz spacecraft with Expedition 23 NASA Flight Engineer Tracy Caldwell Dyson, Soyuz Commander Alexander Skvortsov and Flight Engineer Mikhail Kornienko is scheduled for Friday, April 2, 2010 at 10:04 a.m. Kazakhstan time. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 crew members, from left, NASA's Tracy Caldwell Dyson, Russian Alexander Skvortsov and Russian Mikhail Kornienko are seen during the State Commission meeting to approve the Soyuz launch of Skvortsov, Caldwell Dyson and Mikhail Kornienko on Thursday, April 1, 2010 in Baikonur, Kazakhstan. The crew is kept in a separate room with a glass window in order to help maintain their health. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 crew members, from left, NASA’s Tracy Caldwell Dyson, Russian Alexander Skvortsov and Russian Mikhail Kornienko pose for photographers during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan, Thursday, April 1, 2010. The launch of the Soyuz spacecraft with Expedition 23 NASA Flight Engineer Tracy Caldwell Dyson, Soyuz Commander Alexander Skvortsov and Flight Engineer Mikhail Kornienko is scheduled for Friday, April 2, 2010 at 10:04 a.m. Kazakhstan time. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), waves out a window to fellow crew mates, NASA Astronaut Scott Kelly, and, Russian Cosmonaut Gennady Padalka of Roscosmos, as they prepare to depart the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia for Baikonur, Kazakhstan, Saturday, March 14, 2015, Star City, Russia. The trio is 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 NASA Astronaut Scott Kelly, left, Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) exit the Gagarin Cosmonaut Training Center (GCTC) aircraft after arriving in Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio 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/Victor Zelentsov)

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 43 backup crew member NASA Astronaut Jeff Williams, reflected in mirror, Russian Cosmonauts Mikhail Kornienko, on elliptical, Gennady Padalka of the Russian Federal Space Agency (Roscosmos), and NASA Astronaut Scott Kelly, right, are seen exercising during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Padalka, Kornienko, and 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 NASA Astronaut Scott Kelly, seated left, Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), 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 Russian Cosmonauts Gennady Padalka, background, 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 backup crew member Sergei Volkov of the Russian Federal Space Agency (Roscosmos), left, and Expedition 43 prime crew member Mikhail Kornienko of Roscosmos watch television during a break between classes, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Kornienko and fellow crew members, NASA Astronaut Scott Kelly and Russian Cosmonaut Gennady Padalka of Roscosmos 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 NASA Astronaut Scott Kelly, seated left, Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), 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 Russian Cosmonauts Mikhail Kornienko, left, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and NASA Astronaut Scott Kelly attend a briefing, 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 Russian Cosmonauts Mikhail Kornienko, seated left, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and NASA Astronaut Scott Kelly 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 24 Commander Alexander Skvortsov, front left, and Flight Engineer Mikhail Kornienko, back left, are helped down the stairs of an airplane after their arrival at Chkalovskaya airport just outside Moscow on Saturday, Sept. 25, 2010. Skvortsov, Kornienko and Expedition 24 Flight Engineer Tracy Caldwell Dyson, landed in their Soyuz TMA-18 spacecraft near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 Russian Cosmonauts Mikhail Kornienko, left, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and NASA Astronaut Scott Kelly attend a briefing, 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)

Media document Expedition 43 NASA Astronaut Scott Kelly, Russian Cosmonauts Gennady Padalka, 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, 2nd from left, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) attend a Soyuz TMA-16M Trajectory and Flight Plan briefing, Thursday, March 19, 2015 at Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Padalka, and Kornienko of Roscosmos 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), left, NASA Astronaut Scott Kelly, center, and Russian Cosmonaut Gennady Padalka are seen during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Kelly, Padalka, and 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 24 Flight Engineers Tracy Caldwell Dyson, left, Commander Alexander Skvortsov, center and Mikhail Kornienko sit in chairs outside the Soyuz Capsule just minutes after they landed near the town of Arkalyk, Kazakhstan on Saturday, Sept. 25, 2010. Russian Cosmonauts Skvortsov and Kornienko and NASA Astronaut Caldwell Dyson, are returning from six months onboard the International Space Station where they served as members of the Expedition 23 and 24 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 Flight Engineer Mikhail Kornienko of Russia prepares to have his Russian Sokol suit pressure checked at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko and fellow Expedition 23 crewmembers Soyuz Commander Alexander Skvortsov and NASA Flight Engineer Tracy Caldwell Dyson launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 23 Flight Engineer Mikhail Kornienko of Russia has his Russian Sokol suit pressure checked at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko and fellow Expedition 23 crewmembers Soyuz Commander Alexander Skvortsov and NASA Flight Engineer Tracy Caldwell Dyson launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. Photo Credit: (NASA/Bill Ingalls)

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

Expedition 23 Flight Engineer Russian cosmonaut Mikhail Kornienko, right, receives the traditional blessing from a Russian Orthodox priest at the Cosmonaut Hotel on the morning of the launch of Expedition 23 on a Soyuz rocket to the International Space Station, Friday, April 2, 2010 in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls) 

NASA Expedition 41 backup crew member Flight Engineer Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) answers a question during a press conference Wednesday, Sept. 24, 2014 at the Cosmonaut Hotel in Baikonur, Kazakhstan. The prime crew is set to launch Sept. 26 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 23 crew members NASA’s Tracy Caldwell Dyson (second from left), Russian Alexander Skvortsov and Russian Mikhail Kornienko (right) pose for photographers during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan, Thursday, April 1, 2010. The launch of the Soyuz spacecraft with Expedition 23 NASA Flight Engineer Tracy Caldwell Dyson, Soyuz Commander Alexander Skvortsov and Flight Engineer Mikhail Kornienko is scheduled for Friday, April 2, 2010 at 10:04 a.m. Kazakhstan time. Photo Credit: (NASA/Bill Ingalls)

Expedition 43 NASA Astronaut Scott Kelly, points to his Expedition 43 crew mission patch after placing it on the the Gagarin Cosmonaut Training Center (GCTC) aircraft during his flight from Star City, Russia, to Baikonur, Kazakhstan, with fellow crew members, Russian Cosmonauts Mikhail Kornienko, center, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos), Saturday, March 14, 2015. The trio 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/Victor Zelentsov)

The Expedition 43 crew; NASA Astronaut Scott Kelly, left, Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), center, and Russian Cosmonaut Gennady Padalka of Roscosmos, talk to press prior to departing the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia for Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio is 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)

The Expedition 43 crew; NASA Astronaut Scott Kelly, left, Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), center, and Russian Cosmonaut Gennady Padalka of Roscosmos, talk to press prior to departing the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia for Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio is 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)

Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), left, and Commander of the cosmonaut corps Gagarin Cosmonaut Training Center (GCTC) Valery Korzun walk to meet with Expedition 43 crew members, Gennady Padalka of Roscosmos, and NASA Astronaut Scott Kelly prior to their departure later in the morning from GCTC, Star City Russia to Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio is 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 NASA Astronaut Scott Kelly, left, and Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) pose for a photo prior to departing the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, for Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio 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 Mikhail Kornienko, left, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and NASA Astronaut Scott Kelly answer questions from the press while standing on the Avenue of the Cosmonauts where two long rows of trees are all marked with the name and year of the crew member who planted them starting from Yuri Gagarin's tree, 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 Russian Cosmonauts Mikhail Kornienko, left, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and NASA Astronaut Scott Kelly answer questions from the press while standing on the Avenue of the Cosmonauts where two long rows of trees are all marked with the name and year of the crew member who planted them starting from Yuri Gagarin's tree, 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 Russian Cosmonauts Gennady Padalka, left, and Mikhail Kornienko talk as fellow crew member NASA Astronaut Scott Kelly has his Russian sokol suit pressure checked for launch onboard the Soyuz TMA-16M spacecraft to the International Space Station Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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 backup crew members: Jeff Williams of NASA, left, Sergei Volkov, Alexey Ovchinin, of the Russian Federal Space Agency (Roscosmos), and prime crew members: NASA Astronaut Scott Kelly, Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of Roscosmos attend the ISS Russian Segment Safety briefing, Thursday, March 19, 2015 at 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. 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, and Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) talk to family, friends, and officials from behind glass before departing for their launch onboard the Soyuz TMA-16M spacecraft to the International Space Station Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/GCTC/Andrey Shelepin)

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) prepares to have his Russian sokol suit pressure checked ahead of his launch onboard the Soyuz TMA-16M spacecraft to the International Space Station with fellow crew mates NASA Astronaut Scott Kelly, center, and Russian Cosmonaut Gennady Padalka Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/GCTC/Andrey Shelepin)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), are sen in quarentine behind glass during the State Commission meeting to approve the Soyuz launch to the International Space Station, Thursday, March 26, 2015, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Kornienko, and Padalka launched 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) waves farewell to family and friends as he and fellow crew members NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka depart building 254 for their launch onboard the Soyuz TMA-16M spacecraft to the International Space Station Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/Victor Zelentsov)

Expedition 43 NASA Astronaut Scott Kelly, left, and Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) wait to receive a final salute from officials before departing building 254 for their launch onboard the Soyuz TMA-16M spacecraft to the International Space Station Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/Victor Zelentsov)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) are seen shortly after having donned their Russian sokol suits for their launch onboard the Soyuz TMA-16M spacecraft to the International Space Station, Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/GCTC/Andrey Shelepin)

Expedition 43 NASA Astronaut Scott Kelly, left, and Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) talk to family, friends, and officials from behind glass before departing for their launch onboard the Soyuz TMA-16M spacecraft to the International Space Station Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/GCTC/Andrey Shelepin)

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) prepares to have his Russian sokol suit pressure checked ahead of his launch onboard the Soyuz TMA-16M spacecraft to the International Space Station with fellow crew mates NASA Astronaut Scott Kelly, center, and Russian Cosmonaut Gennady Padalka Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/GCTC/Andrey Shelepin)

Expedition 43 Russian cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) answers reporter’s questions as he and, Russian cosmonaut Gennady Padalka of Roscosmos, and NASA Astronaut Scott Kelly participate in a crew press conference, Thursday, March 26, 2015, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Kornienko, and Padalka launched 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 Mikhail Kornienko, left, and Gennady Padalka, of the Russian Federal Space Agency (Roscosmos), and NASA Astronaut Scott Kelly answer reporters questions after having completed the Soyuz TMA-16M spacecraft final check, Monday, March 23, 2015 at the Baikonur Cosmodrome in Kazakhstan. Kelly, Kornienko, and Padalka 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)

The Expedition 43 crews is seen in quarantine behind glass during a crew press conference, NASA Astronaut Scott Kelly, left, Russian cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) Thursday, March 26, 2015, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Kornienko, and Padalka launched 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 prime and backup crew members: Russian Cosmonauts Mikhail Kornienko, left, Gennady Padalka, of the Russian Federal Space Agency (Roscosmos), NASA Astronauts Scott Kelly, and Jeff Williams, andRussian Cosmonauts, Alexei Ovchinin, and Sergei Volkov of Roscosmos participate in the traditional flag raising ceremony at the Cosmonaut Hotel, Monday, March 16, 2015 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. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Victor Zelentsov)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) are seen during a crew press conference, Thursday, March 26, 2015, at the Cosmonaut Hotel in Baikonur, Kazakhstan. Kelly, Kornienko, and Padalka launched 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), left, NASA Astronaut Scott Kelly, center, and Russian Cosmonaut Gennady Padalka all have their Russian sokol suits pressure checked for their launch onboard the Soyuz TMA-16M spacecraft to the International Space Station, Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/GCTC/Andrey Shelepin)

Expedition 43 NASA Astronaut Scott Kelly, left, and Russian Cosmonauts Gennady Padalka, center, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) depart building 254 for their launch onboard the Soyuz TMA-16M spacecraft to the International Space Station Friday, March 27, 2015 in Baikonor, Kazakhstan. Kelly, Padalka, and Kornienko launched to the ISS 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/Victor Zelentsov)

Expedition 43 prime and backup crew members: Russian Cosmonauts Mikhail Kornienko, left, Gennady Padalka, of the Russian Federal Space Agency (Roscosmos), NASA Astronauts Scott Kelly, and Jeff Williams, andRussian Cosmonauts, Alexei Ovchinin, and Sergei Volkov of Roscosmos participate in the traditional flag raising ceremony at the Cosmonaut Hotel, Monday, March 16, 2015 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. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Victor Zelentsov)

Expedition 43 prime crew: NASA Flight Engineer Scott Kelly, Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), along with their backup crew: Jeff Williams of NASA, Russian Cosmonauts Alexei Ovchinin, and Sergei Volkov of Roscosmos attend a traditional flag raising ceremony at the Cosmonaut Hotel, Monday, March 16, 2015 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. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/Victor Zelentsov)

Expedition 23 prime and backup crew members, from left, NASA's Tracy Caldwell Dyson, Russian Aleksander Skvortsov, Russian Mikhail Kornienko, NASA's Scott Kelly, Russian Alexander Samokutyayev, and Russian Andrei Borisenko are seen during the State Commission meeting to approve the Soyuz launch of Caldwell Dyson, Skvortsov and Kornienko, Thursday, April 1, 2010 in Baikonur, Kazakhstan. The crew is kept in a separate room with a glass window in order to help maintain their health. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 Flight Engineer Mikhail Kornienko of Russia, top, NASA Flight Engineer Tracy Caldwell Dyson of the U.S. and Soyuz Commander Alexander Skvortsov of Russia, bottom, wave farewell from the bottom of the Soyuz rocket at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko, Caldwell Dyson and Skvortsov launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010 at 10:04 a.m. Photo Credit: (NASA/Carla Cioffi)

Expedition 23 NASA Flight Engineer Tracy Caldwell Dyson, left, Soyuz Commander Alexander Skvortsov or Russia, and Flight Engineer Mikhail Kornienko of the Russia, right, have their Russian Sokol suits prepared for launch by a technicians at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Caldwell Dyson, Skvortsov and Kornienko and launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 23 Flight Engineer Mikhail Kornienko of the Russia has his Russian Sokol suit prepared for launch by a technician at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko and fellow Expedition 23 crewmembers Soyuz Commander Alexander Skvortsov and NASA Flight Engineer Tracy Caldwell Dyson of the U.S. launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 23 Flight Engineer Mikhail Kornienko of Russia, top, NASA Flight Engineer Tracy Caldwell Dyson of the U.S. and Soyuz Commander Alexander Skvortsov of Russia, bottom, wave farewell from the bottom of the Soyuz rocket at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko, Caldwell Dyson and Skvortsov launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010 at 10:04 a.m. Photo Credit: (NASA/Carla Cioffi)

Expedition 23 NASA Flight Engineer Tracy Caldwell Dyson, left, speaks during the State Commission meeting at the Cosmonaut Hotel while her colleagues Soyuz Commander Alexander Skvortsov and Flight Engineer Mikhail Kornienko, right, listen on Thursday, April 1, 2010 in Baikonur, Kazakhstan. The State Commission meeting approves the Soyuz launch of Caldwell Dyson, Skvortsov and Kornienko to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 Soyuz Commander Alexander Skvortsov, center, holds up a poster of the Expedition 23 crew while Flight Engineer Tracy Caldwell Dyson and Flight Engineer Mikhail Kornienko, right, smile during the State Commission meeting held at the Cosmonaut Hotel, Thursday, April 1, 2010 in Baikonur, Kazakhstan. The State Commission meeting approves the Soyuz launch of Caldwell Dyson, Skvortsov and Kornienko to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 Flight Engineer Mikhail Kornienko of the Russia has his Russian Sokol suit prepared for launch by a technician at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko and fellow Expedition 23 crewmembers Soyuz Commander Alexander Skvortsov and NASA Flight Engineer Tracy Caldwell Dyson of the U.S. launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 23 Flight Engineer Mikhail Kornienko of Russia has his Russian Sokol suit pressure checked at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko and fellow Expedition 23 crewmembers Soyuz Commander Alexander Skvortsov and NASA Flight Engineer Tracy Caldwell Dyson launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 23 Flight Engineer Mikhail Kornienko of the Russia has his Russian Sokol suit prepared for launch by a technician at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Friday, April 2, 2010. Kornienko and fellow Expedition 23 crewmembers Soyuz Commander Alexander Skvortsov and NASA Flight Engineer Tracy Caldwell Dyson of the U.S. launched in their Soyuz TMA-18 rocket from the Baikonur Cosmodrome in Kazakhstan on Friday, April 2, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos), top, NASA Astronaut Scott Kelly, center, and Russian Cosmonaut Gennady Padalka of Roscosmos wave farewell as they board the Soyuz TMA-16M spacecraft ahead of their launch to the International Space Station, Friday, March 27, 2015 in Baikonor, Kazakhstan. 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 Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) dons his Russian sokol suit ahead of his launch onboard the Soyuz TMA-16M spacecraft to the International Space Station with fellow crew mates, NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka of Roscosmos Friday, March 27, 2015 in Baikonor, Kazakhstan. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 43 Russian Cosmonaut Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) dons his Russian sokol suit ahead of his launch onboard the Soyuz TMA-16M spacecraft to the International Space Station with fellow crew mates, NASA Astronaut Scott Kelly, and Russian Cosmonaut Gennady Padalka of Roscosmos Friday, March 27, 2015 in Baikonor, Kazakhstan. As the one-year crew, Kelly and Kornienko will return to Earth on Soyuz TMA-18M in March 2016. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 23 crew members NASA Flight Engineer Tracy Caldwell Dyson, left, Soyuz Commander Alexander Skvortsov and Flight Engineer Mikhail Kornienko, right, leave the Cosmonaut Hotel on the morning of their launch on a Soyuz rocket to the International Space Station, Friday, April 2, 2010, in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

Expedition 23 Flight Engineer Tracy Caldwell Dyson, left, Expedition 23 Soyuz Commander Alexander Skvortsov and Expedition 23 Flight Engineer Mikhail Kornienko, right, talk with family and colleagues from behind glass prior to their launch onboard a Soyuz rocket to the International Space Station (ISS), Friday, April 2, 2010 in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

The crew of Expedition 23 are seen on a large TV screen in the Russian Mission Control Center in Korolev, Russia, Sunday, April 4, 2010, shortly after the Soyuz TMA-18 spacecraft docked to the International Space Station and delivered Expedition 23 Flight Engineers Alexander Skvortsov, Mikhail Kornienko and Tracy Caldwell Dyson. Clockwise from top right are NASA astronaut TJ Creamer, NASA astronaut Tracy Caldwell Dyson, Russian cosmonaut Alexander Skvortsov, Russian cosmonaut Mikhail Kornienko, JAXA (Japan Aerospace Exploration Agency) astronaut Soichi Noguchi and Expedition 23 commander Russian cosmonaut Oleg Kotov . Photo Credit: (NASA/Carla Cioffi)

Expedition 43 NASA Astronaut Scott Kelly, left, and Russian Cosmonauts Mikhail Kornienko, center, and Gennady Padalka of the Russian Federal Space Agency (Roscosmos) walk with family and friends as they depart the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia, for Baikonur, Kazakhstan, Saturday, March 14, 2015. The trio 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 prime and backup crews arrive at the Cosmonaut Hotel during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Expedition 43 NASA Astronaut Scott Kelly, and Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) 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 Mikhail Kornienko, left, Gennady Padalka of the Russian Federal Space Agency (Roscosmos), and, NASA Astronaut Scott Kelly take a moment during their Soyuz TMA-16M spacecraft fit check to pose for a photograph, Sunday, March 15, 2015 at the Baikonur Cosmodrome in Kazakhstan. The trio 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/Victor Zelentsov)

Expedition 43 NASA Astronaut Scott Kelly, left, Russian cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and Russian cosmonaut Mikhail Kornienko of Roscosmos walk along the Kremlin Wall in Red Square to leave roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Friday, March 6, 2015, Moscow, Russia. The trio is 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 prime and backup crews walk from the Cosmonaut Hotel over to the Zvjozdnyj Hotel for a short break during media day, Saturday, March 21, 2015, Baikonur, Kazakhstan. Expedition 43 NASA Astronaut Scott Kelly, and Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) 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 NASA Astronaut Scott Kelly, left, Russian cosmonaut Gennady Padalka of the Russian Federal Space Agency (Roscosmos), center, and Russian cosmonaut Mikhail Kornienko of Roscosmos pose for a photograph in front of St. Basil's Cathedral in Moscow as part of traditional pre-launch ceremonies, Friday, March 6, 2015. The trio is 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)