Expedition 31 Flight Engineer Sergei Revin performs the tradition of signing one of the doors at the Cosmonaut Hotel on Tuesday, May 15, 2012 in Baikonur, Kazakhstan. The Soyuz spacecraft with Revin, Expedition 31 Soyuz Commander Gennady Padalka, 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 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)

Expedition 32 Russian Flight Engineer Sergei Revin is seen as he rests outside the Soyuz TMA-04M capsule just minutes after he and Expedition 32 Commander Gennady Padalka and NASA Flight Engineer Joe Acaba landed in a remote area outside of the town of Arkalyk, Kazakhstan, on Monday, Sept. 17, 2012. Revin, Padalka and Acaba are returning 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)

Quarantined Expedition 31 Flight Engineer Sergei Revin of Russia 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 Revin, Soyuz Commander Gennady Padalka, and NASA Flight Engineer Joe Acaba is scheduled for 9:01 a.m. local time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

Expedition 31 Flight Engineer Sergei Revin of Russia adjust his watch shirtly after donning his Russian Sokol suit 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 Revin, Expedition 31 Soyuz Commander Gennady Padalka, 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 Flight Engineer Sergei Revin of Russia dons his Russian Sokol suit 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 Revin, Expedition 31 Soyuz Commander Gennady Padalka, and Flight Engineer Joe Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Flight Engineer Sergei Revin 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 Revin, Expedition 31 Soyuz Commander Gennady Padalka and Flight Engineer Joe Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Flight Engineer Sergei Revin sits down to have 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 Revin, Expedition 31 Soyuz Commander Gennady Padalka 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)

Expedition 31 Flight Engineer Sergei Revin of Russia dons his Russian Sokol suit 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 Revin, Expedition 31 Soyuz Commander Gennady Padalka, 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, 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)

Flight Engineer Sergei Revin sits down to have 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 Revin, Expedition 31 Soyuz Commander Gennady Padalka 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 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 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 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 crew members Joe Acaba, left, Commander Gennady Padalka and Sergei Revin, right, wave farewell as they depart 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/Victor Zelenstov)

Expedition 29 backup crew members NASA Flight Engineer Joseph Acaba, far left, Russian Soyuz Commander Gennady Padalka, center, and Russian Flight Engineer Sergei Revin are seen at a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Saturday, Nov. 12, 2011. Photo Credit: (NASA/Carla Cioffi)

Expedition 29 backup crew member Sergei Revin speaks during the State Commission meeting to approve the Soyuz launch of Expedition 29 to the International Space Station, Saturday, Nov. 12, 2011 at the Cosmonaut Hotel in Baikonur, Kazakhstan. The mission is set to launch November 14 from the Baikonur Cosmodrome. Photo Credit: (NASA/Carla Cioffi)

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)

Expedition 31 NASA NASA Flight Engineer Joe Acaba signs for his International Space Station Russian segment event simulation test card before senior officials at the Gagarin Cosmonaut Training Center, Monday, April 23, 2012 in Star City, Russia, while his fellow crew members Soyuz commander Gennady Padalka (left) and Sergei Revin look on. Acaba, Padalka 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)

Expedition 31 Flight Engineer Joe Acaba, left, Soyuz Commander Gennady Padalka, and Flight Engineer Sergei Revin, right, don their Russian Sokol suits ahead of their launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, Revin, and Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

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

Expedition 31 Soyuz Commander Gennady Padalka, bottom, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin, top, wave farewell from the base of the Soyuz rocket at the Baikonur Cosmodrome in Kazakhstan, Tuesday, May 15, 2012. The launch of the Soyuz spacecraft with Padalka, Revin, and Acaba is scheduled for 9:01 a.m. local time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

Expedition 32 NASA Flight Engineer Joe Acaba, left, Expedition 32 Commander Gennady Padalka, center, and Flight Engineer Sergei Revin sit in chairs outside the Soyuz Capsule just minutes after they landed in a remote area outside the town of Arkalyk, Kazakhstan, on Monday, Sept. 17, 2012. Acaba, Padalka and Revin are returning 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)

Expedition 31 Soyuz Commander Gennady Padalka, left, and Flight Engineer Sergei Revin talk as technicians assist with donning the Russian Sokol suits ahead of their launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, 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 Flight Engineer Joe Acaba, left, Soyuz Commander Gennady Padalka, and Flight Engineer Sergei Revin, right, don their Russian Sokol suits ahead of their launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, Revin, and Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Quarantined Expedition 31 prime crew members, from left, NASA Flight Engineer Joe Acaba, Russian Soyuz Commander Gennady Padalka, and Russian Flight Engineer Sergei Revin answer 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 the crew of three is scheduled for 9:01 a.m. local time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

Quarantined Expedition 31 prime crew members, from left, NASA Flight Engineer Joe Acaba, Russian Soyuz Commander Gennady Padalka, and Russian Flight Engineer Sergei Revin pose for a group photograph 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 the crew of three is scheduled for 9:01 a.m. local time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

Expedition 29 backup crew members NASA Flight Engineer Joseph Acaba, far left, Russian Soyuz Commander Gennady Padalka, center, and Russian Flight Engineer Sergei Revin are seen the State Commission meeting to approve the Soyuz launch of Expedition 29 to the International Space Station in Baikonur, Kazakhstan on Saturday, Nov. 12, 2011. Photo Credit: (NASA/Carla Cioffi)

Quarantined Expedition 31 prime crew members, from left, NASA Flight Engineer Joe Acaba, Russian Soyuz Commander Gennady Padalka, Russian Flight Engineer Sergei Revin, along with Expedition 31 backup few members, Kevin Ford, Oleg Novitskiy and Evgeny Tarelkin prepare to answer 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)

Quarantined Expedition 31 prime crew members, from left, NASA Flight Engineer Joe Acaba, Russian Soyuz Commander Gennady Padalka, Russian Flight Engineer Sergei Revin, along with Expedition 31 backup few members, Kevin Ford, Oleg Novitskiy and Evgeny Tarelkin pose for a group photo 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, Revin, and Acaba is scheduled for 9:01 a.m. local time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

Expedition 31 Flight Engineer Joe Acaba, left, Soyuz Commander Gennady Padalka, and, Flight Engineer Sergei Revin, right, receive a formal go for launch from Vitaly Alexandrovich Lopota, President of Energia, left, and Vladimir Popovkin, Director of Roscosmos prior to their launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, Revin, and Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 29 crew members NASA Flight Engineer Daniel Burbank, far left, Russian Soyuz Commander Anton Shkaplerov, Russian Flight Engineer Anatoly Ivanishin, Expedition 29 NASA back up crew member Joseph Acaba, backup Soyuz Commander Gennady Padalka and backup Flight Engineer Sergei Revin are seen at the start of a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Saturday, Nov. 12, 2011. Photo Credit: (NASA/Carla Cioffi)

Expedition 29 crew members NASA Flight Engineer Daniel Burbank, far left, Russian Soyuz Commander Anton Shkaplerov, Russian Flight Engineer Anatoly Ivanishin, Expedition 29 NASA back up crew member Joseph Acaba, backup Soyuz Commander Gennady Padalka and backup Flight Engineer Sergei Revin, far right, pose for photos at the end of a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Saturday, Nov. 12, 2011. Photo Credit: (NASA/Carla Cioffi)

Expedition 31 Soyuz Commander Gennady Padalka lies in a chair to have 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 Flight Engineer Joe Acaba, seated left, Soyuz Commander Gennady Padalka, and, Flight Engineer Sergei Revin, seated right, pose for a picture with their backup crew members Kevin Ford, standing left, Oleg Novitskiy and Evgeny Tarelkin, standing right, just a few hours before their launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, Revin, and Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

View from the balcony of the Russian Mission Control Center shows live television of the Expedition 31 crew members gathered together on the International Space Station a few hours after the Soyuz TMA-04M spacecraft docked on Thursday, May 17, 2012, in Korolev, Russia. Pictured are Expedition 31 crew members NASA Flight Engineer Don Pettit, back left, Oleg Kononenko of Russia, ESA (European Space Agency) astronaut and Flight Engineer Andre Kuipers, back right, Flight Engineer Sergei Revin, front left, Soyuz Commander Gennady Padalka, and Flight Engineer Joe Acaba, bottom right. Padalka, Revin and Acaba's arrival to the International Space Station comes two days after they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Bill Ingalls)

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.

ISS032-E-020528 (19 Aug. 2012) --- Russian cosmonaut Sergei Revin, Expedition 32 flight engineer, works near a hatch on the International Space Station.

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 Flight Engineer Joe Acaba waves farewell to friends and family as his bus departs the Cosmonaut Hotel with fellow Expedition 31 crew members, Commander Gennady Padalka and Sergei Revin on Tuesday, May 15, 2012 in Baikonur, Kazakhstan. The Soyuz spacecraft with Expedition 31 Soyuz Commander Gennady Padalka, Flight Engineer Sergei Revin, and Acaba onboard launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

View from the balcony of the Russian Mission Control Center shows a photo of the Expedition 32 crew members gathered together, Tuesday, July 17, 2012, in Korolev, Russia. Pictured are Expedition 32 crew members JAXA Flight Engineer Akihiko Hoshide, far left, Soyuz Commander Yuri Malenchenko, NASA Flight Engineer Sunita Williams, NASA Flight Engineer Joe Acaba, Expedition 32 Commander Gennady Padalka of Russia, Flight Engineer Sergei Revin of Russia, far right. Malenchenko, Williams and Hoshide's arrival to the International Space Station comes two days after they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Carla Cioffi)

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

ISS032-E-020849 (20 Aug. 2012) --- Russian cosmonaut Sergei Revin, Expedition 32 flight engineer, moves through a hatch in the Russian segment of the International Space Station.

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

ISS032-E-010076 (22 July 2012) --- Russian cosmonaut Sergei Revin (left) and NASA astronaut Joe Acaba, both Expedition 32 flight engineers, use a computer in the Zvezda Service Module of the International Space Station.

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

Soyuz 30/31 Crew Press Conference (Joe Acaba, Gennady Padalka (RSA), Sergei Revin (RSA). Photo Date: January 11, 2012. Location: Building 2N, Press Conference Room. Photographer: Robert Markowitz

ISS032-E-019041 (16 Aug. 2012) --- Russian cosmonaut Sergei Revin, Expedition 32 flight engineer, uses a computer in the Zvezda Service Module of the International Space Station.

The Soyuz TMA-04M spacecraft is seen as it lands with Expedition 32 Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin in a remote area near the town of Arkalyk, Kazakhstan, on Monday, September 17, 2012. Padalka, Acaba and Revin 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)

Expedition 32 NASA Flight Engineer Joe Acaba is carried in a chair to the medical tent after he and Expedition 32 Commander Gennady Padalka and Flight Engineer Sergei Revin landed in their Soyuz TMA-04M capsule in a remote area near the town of Arkalyk, Kazakhstan, on Monday, Sept. 17, 2012. Acaba, Padalka and Revin 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)

(26 April 2012) -- At the headquarters of the Russian Federal Space Agency, Expedition 31 Soyuz Commander Gennady Padalka (left), flight engineer Sergei Revin and NASA Flight Engineer Joe Acaba field questions from Roscosmos officials April 26, 2012 prior to their departure May 2 for their launch site in Baikonur, Kazakhstan. Padalka, Revin and Acaba are scheduled to launch to the International Space Station May 15 in their Soyuz TMA-04M spacecraft. Photo credit: NASA

The Soyuz TMA-04M spacecraft is seen as it lands with Expedition 32 Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin in a remote area near the town of Arkalyk, Kazakhstan, on Monday, September 17, 2012. Padalka, Acaba and Revin 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)

The Soyuz TMA-04M spacecraft is seen following its landing with Expedition 32 Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin in a remote area near the town of Arkalyk, Kazakhstan, on Monday, September 17, 2012. Padalka, Acaba and Revin 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)

At the Baikonur Cosmodrome in Kazakhstan, Expedition 31/32 Flight Engineer Joe Acaba of NASA looks up at the control panel aboard his Soyuz TMA-04M spacecraft May 3, 2012 during a suited “fit check” dress rehearsal of launch day activities in advance of his launch May 15 along with Soyuz Commander Gennady Padalka and Flight Engineer Sergei Revin to the International Space Station. Acaba, Padalka and Revin will spend four months aboard the orbital outpost. NASA/Victor Zelentsov

The Soyuz TMA-04M spacecraft is seen as it lands with Expedition 32 Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin in a remote area near the town of Arkalyk, Kazakhstan, on Monday, September 17, 2012. Padalka, Acaba and Revin 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)

Expedition 32 NASA Flight Engineer Joe Acaba is helped from a Russian Search and Rescue all terrain vehicle (ATV) after he and Expedition 32 Commander Gennady Padalka and Flight Engineer Sergei Revin returned from the International Space Station on Monday, Sept. 17, 2012. Acaba, Padalka and Revin 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)

At the Baikonur Cosmodrome in Kazakhstan, Expedition 31/32 Flight Engineer Joe Acaba of NASA flashes a smile as he climbs aboard his Soyuz TMA-04M spacecraft May 3, 2012 during a suited “fit check” dress rehearsal of launch day activities in advance of his launch May 15 along with Soyuz Commander Gennady Padalka and Flight Engineer Sergei Revin to the International Space Station. Acaba, Padalka and Revin will spend four months aboard the orbital outpost. NASA/Victor Zelentsov

At the Baikonur Cosmodrome in Kazakhstan, Expedition 31/32 Flight Engineer Joe Acaba of NASA (left), Soyuz Commander Gennady Padalka (center) and Flight Engineer Sergei Revin walk past their Soyuz booster rocket in the Cosmodrome’s integration facility May 3, 2012 following a suited “fit check” dress rehearsal of launch day activities in advance of their launch May 15 to the International Space Station. Acaba, Padalka and Revin will spend four months aboard the orbital outpost. NASA/Victor Zelentsov

Expedition 32 NASA Flight Engineer Joe Acaba is helped from a Russian Search and Rescue all terrain vehicle (ATV) to his helicopter after he and Expedition 32 Commander Gennady Padalka and Flight Engineer Sergei Revin returned from the International Space Station on Monday, Sept. 17, 2012. Acaba, Padalka and Revin 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)

Russian support personnel are seen as they access the crew of the Soyuz TMA-04M capsule shortly after it landed with Expedition 32 Commander Gennady Padalka of Russia and Flight Engineers Joe Acaba of NASA and Sergei Revin of Russia in a remote area near the town of Arkalyk, Kazakhstan, on Monday, Sept. 17, 2012. Padalka, Acaba and Revin 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)

The Soyuz TMA-04M spacecraft is seen as it lands with Expedition 32 Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin in a remote area near the town of Arkalyk, Kazakhstan, on Monday, September 17, 2012. Padalka, Acaba and Revin 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)

The Soyuz rocket is seen in the monitor of a video camera moments before Expedition 31 Soyuz Commander Gennady Pedalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin arrive to board the rocket at the Baikonur Cosmodrome in Kazakhstan, Tuesday, May 15, 2012. The launch of the Soyuz spacecraft with Padalka, Revin, and Acaba is scheduled for 9:01 a.m. local time on Tuesday, May 15. Photo Credit (NASA/Bill Ingalls)

At the Baikonur Cosmodrome in Kazakhstan, Expedition 31/32 Flight Engineer Joe Acaba of NASA (left), Soyuz Commander Gennady Padalka (center) and Flight Engineer Sergei Revin share a light moment as they pose with their “Sokol” launch and entry suits in the Cosmodrome’s integration facility May 3, 2012 during a dress rehearsal of launch day activities in advance of their launch May 15 to the International Space Station. Acaba, Padalka and Revin will spend four months aboard the orbital outpost. NASA/Victor Zelentsov

The Soyuz TMA-04M spacecraft is seen as it lands with Expedition 32 Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin in a remote area near the town of Arkalyk, Kazakhstan, on Monday, September 17, 2012. Padalka, Acaba and Revin 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)

View from the balcony of the Russian Mission Control Center shows live television of the Expedition 32 crew members gathered together on the International Space Station a few hours after the Soyuz TMA-05M spacecraft docked on Tuesday, July 17, 2012, in Korolev, Russia. Pictured are Expedition 32 crew members NASA Flight Engineer Joe Acaba, back left, Expedition 32 Commander Gennady Padalka of Russia, Sergei Revin of Russia, back right, Flight Engineer Akihiko Hoshide, front left, Soyuz Commander Yuri Malenchenko, and Flight Engineer Sunita Williams, bottom right. Malenchenko, Williams and Hoshide's arrival to the International Space Station comes two days after they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Carla Cioffi)

The Soyuz TMA-04M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Tuesday, May 15, 2012 carrying Expedition 31 Soyuz Commander Gennady Padalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-04M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Tuesday, May 15, 2012 carrying Expedition 31 Soyuz Commander Gennady Padalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

ISS031-E-140701 (23 June 2012) --- Russian cosmonaut Sergei Revin, Expedition 31 flight engineer, works on the BTKh-26 KASKAD (Cascade) experiment in the Rassvet Mini-Research Module 1 (MRM-1) of the International Space Station.

The Soyuz TMA-04M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Tuesday, May 15, 2012 carrying Expedition 31 Soyuz Commander Gennady Padalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-04M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Tuesday, May 15, 2012 carrying Expedition 31 Soyuz Commander Gennady Padalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

ISS032-E-005012 (30 June 2012) --- Russian cosmonaut Sergei Revin, Expedition 32 flight engineer, is pictured near Russian biotechnology experiment BTKh-26 STRUKTURA (Luch-2) hardware floating freely in the Zvezda Service Module of the International Space Station.

The Soyuz TMA-04M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Tuesday, May 15, 2012 carrying Expedition 31 Soyuz Commander Gennady Padalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

The Soyuz TMA-04M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Tuesday, May 15, 2012 carrying Expedition 31 Soyuz Commander Gennady Padalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

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.

ISS031-E-140699 (23 June 2012) --- Russian cosmonaut Sergei Revin, Expedition 31 flight engineer, works on the BTKh-26 KASKAD (Cascade) experiment in the Rassvet Mini-Research Module 1 (MRM-1) of the International Space Station.

JSC2012-E-042062 (23 Aug. 2011) --- Russian cosmonaut Sergei Revin, Expedition 31/32 flight engineer, attired in a Russian Sokol launch and entry suit, takes a break from training in Star City, Russia to pose for a portrait. Photo credit: Gagarin Cosmonaut Training Center

The Soyuz TMA-04M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Tuesday, May 15, 2012 carrying Expedition 31 Soyuz Commander Gennady Padalka, NASA Flight Engineer Joseph Acaba and Flight Engineer Sergei Revin to the International Space Station. Photo Credit: (NASA/Bill Ingalls)

At the historic museum near the launch pad at the Baikonur Cosmodrome in Kazakhstan, the Expedition 31/32 backup and prime crews pose for pictures May 11, 2012 in front of the mural depicting the likeness of Yuri Gagarin, the first human to fly in space. The photo session took place as training for the launch of Soyuz Commander Gennady Padalka, Flight Engineer Joe Acaba of NASA and Flight Engineer Sergei Revin drew to a close for their liftoff May 15 in their Soyuz TMA-04 spacecraft to begin a four-month mission on the International Space Station. From left to right are backup crewmembers Oleg Novitskiy, Kevin Ford of NASA and Evgeny Tarelkin, and the prime crew, Padalka, Revin and Acaba. In the foreground are replicas of the small cottages Gagarin and the Russian space program’s “Great Designer”, Sergei Korolev slept in on the eve of Gagarin’s launch on April 12, 1961. The real cottages are located near the museum in Baikonur. NASA/Victor Zelentsov

(26 April 2012) -- At the headquarters of the Russian Federal Space Agency, Expedition 31 prime and backup crewmembers pose for a photo with Roscosmos officials. From left: Expedition 31 prime crew of NASA flight engineer Joe Acaba, Soyuz Commander Gennady Padalka and flight engineer Sergei Revin. At center: Vladimir Popovkin, Head of Roscosmos; Alex Krasnov Director, Piloted Programs, Russian Federal Space Agency; and Expedition 31 backup crewmembers - cosmonauts Oleg Novitskiy and Evgeny Tarelkin, and Kevin Ford of NASA. Padalka, Revin and Acaba are scheduled to launch to the International Space Station May 15 in their Soyuz TMA-04M spacecraft. Photo credit:NASA

(2 May, 2012) --- At the Gagarin Cosmonaut Training Center at Star City, Russia on May 2, 2012, veteran cosmonaut Alexei Leonov, the first human to conduct a spacewalk in 1965, poses for a photo with Expedition 31 crewmembers prior to their farewell sendoff to the Baikonur Cosmodrome in Kazakhstan. From left to right are NASA Flight Engineer Joe Acaba, cosmonaut Leonov, Soyuz Commander Gennady Padalka, and Flight Engineer Sergei Revin. Acaba, Padalka and Revin are scheduled to launch to the space station on May 15 in their Soyuz TMA-04M spacecraft. NASA/Stephanie Stoll

Expedition 32 NASA Flight Engineer Joe Acaba is seen as he rests outside the Soyuz TMA-04M capsule just minutes after he and Expedition 32 Soyuz Commander Gennady Padalka and Russian Flight Engineer Sergei Revin landed in a remote area outside of the town of Arkalyk, Kazakhstan, on Monday, Sept. 17, 2012. NASA Astronaut Acaba, Russian Cosmonauts Padalka and Revin are returning 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)

A view inside inside the Russian Search and Rescue helicopter that will carry Expedition 32 Flight Engineer Joe Acaba from the Soyuz TMA-04M landing site in a remote area outside Arkalyk, Kazakhstan to Kostanay, Kazakhstan shortly after he and Expedition 32 Commander Gennady Padalka and Flight Engineer Sergei Revin returned from the International Space Station on Monday, Sept. 17, 2012. Acaba, Padalka and Revin 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)

ISS032-E-025686 (7 Sept. 2012) --- Russian cosmonaut Sergei Revin, Expedition 32 flight engineer, attired in a Russian Sokol launch and entry suit, is pictured in the Soyuz 30 (TMA-04M) spacecraft currently docked to the International Space Station?s Poisk Mini-Research Module 2 (MRM2). Revin, along with Russian cosmonaut Gennady Padalka and NASA astronaut Joe Acaba (both out of frame) were conducting a standard suit leak check in the Soyuz spacecraft in preparation for their return to Earth scheduled for Sept. 16, 2012.

Outside their Cosmonaut Hotel crew quarters in Baikonur, Kazakhstan, the Expedition 31/32 prime and backup crews conducted the traditional raising of Russian, U.S. and Kazakh flags May 4, 2012 as part of their ceremonial activities leading up to the launch of the Soyuz TMA-04M spacecraft May 15 to the International Space Station. From left to right are prime Soyuz Commander Gennady Padalka and Flight Engineer Sergei Revin, prime NASA Flight Engineer Joe Acaba and backup NASA Flight Engineer Kevin Ford and backup Russian crewmembers Oleg Novitskiy and Evgeny Tarelkin. Padalka, Revin and Acaba will launch to the station for a four-month mission on the orbital outpost. NASA/Victor Zelentsov

Expedition 32 NASA Flight Engineer Joe Acaba is seen as he rests outside the Soyuz TMA-04M capsule just minutes after he and Expedition 32 Soyuz Commander Gennady Padalka and Russian Flight Engineer Sergei Revin landed in a remote area outside of the town of Arkalyk, Kazakhstan, on Monday, Sept. 17, 2012. NASA Astronaut Acaba, Russian Cosmonauts Padalka and Revin are returning 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)

Expedition 32 NASA Flight Engineer Joe Acaba rests on the Russian Search and Rescue helicopter that is carrying him from the Soyuz TMA-04M landing site in a remote area outside Arkalyk, Kazakhstan to Kostanay, Kazakhstan shortly after he and Expedition 32 Commander Gennady Padalka and Flight Engineer Sergei Revin returned from the International Space Station on Monday, Sept. 17, 2012. Acaba, Padalka and Revin 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)

Outside their Cosmonaut Hotel crew quarters in Baikonur, Kazakhstan, the Expedition 31/32 prime and backup crews posed for pictures May 4, 2012 following the traditional raising of Russian, U.S. and Kazakh flags as part of their ceremonial activities leading up to the launch of the Soyuz TMA-04M spacecraft May 15 to the International Space Station. From left to right are prime Soyuz Commander Gennady Padalka, Flight Engineer Sergei Revin and NASA Flight Engineer Joe Acaba and backup crewmembers Oleg Novitskiy, Evgeny Tarelkin and Kevin Ford of NASA. Padalka, Revin and Acaba will launch to the station for a four-month mission on the orbital outpost. NASA/Victor Zelentsov

(seated), flanked by Expedition 31 prime and backup crewmembers, signs a traditional cosmonauts' log at the site's Yuri Gagarin museum. Front at left is NASA astronaut Joe Acaba, flight engineer, and at front row, right is Russian cosmonaut and flight engineer Sergei Revin. Back row,from left are Expedition 31 backup crewmembers Kevin Ford of NASA and Russian cosmonauts Oleg Novitskiy and Evgeny Tarelkin. Acaba, Padalka and Revin are preparing for the launch May 15 that will take them to the International Space Station on the Soyuz TMA-04M spacecraft from the Baikonur Cosmodrome in Kazakhstan. Photo credit: NASA/Stephanie Stoll

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.