NASA Administrator Charles Bolden, left, Head of the Russian Federal Space Agency, Anatoly Perminov, center, and Deputy Head of the Russian Federal Space Agency, Vitaly A. Davyidov listen to reporters questions during a press conference at Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station (ISS) marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. The entire crew onboard the ISS can be seen in the monitor below. Photo Credit: (NASA/Bill Ingalls)

A view of the Russian Mission Control Center in Korolev, Russia on Friday, March 28, 2014 prior to the docking of Soyuz TMA-12M. The Soyuz TMA-12M spacecraft docked to the International Space Station at 7:53 p.m. EDT bringing Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, Flight Engineer Steve Swanson of NASA and Flight Engineer Oleg Artemyev of Roscosmos to the ISS for their six month stay aboard the orbiting labratory. Photo Credit: (NASA/Joel Kowsky)

A view from the balcony of the Russian Mission Control Center shows live television of the Expedition 39 crew members gathered together on the International Space Station a few hours after the Soyuz TMA-12M spacecraft docked on Friday, March 28, 2014, in Korolev, Russia. Pictured are Expedition 39 crew members Flight Engineer Steve Swanson of NASA, left, Commander Koichi Wakata of the Japan Aerospace Exploration Agency, JAXA, back left, Flight Engineer Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, front center, Flight Engineer Rick Mastracchio of NASA, back center, Flight Engineer Mikhail Tyurin of Roscosmos, back right and Flight Engineer Oleg Artemyev of Roscosmos, front right. Swanson, Skvortsov, and Oleg's arrival to the International Space Station comes two days after they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Joel Kowsky)

NASA Administrator Charles Bolden, Left, and Head of the Russian Federal Space Agency, Anatoly Perminov turn to pose for a photograph at Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station (ISS) marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Lalibreté will return to Earth with the Expedition 20 crew on October 11, 2009. Photo Credit: (NASA/Bill Ingalls)

Anna-Marie Williams talks on the phone to her husband Expedition 21 with Flight Engineer Jeffrey N. Williams who is onboard the International Space Station (ISS) from the Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station marking the start of Expedition 21 with Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Photo Credit: (NASA/Bill Ingalls)

Expedition 39 Flight Engineer Oleg Artemyev of the Russian Federal Space Agency, Roscosmos, left, is seen on the TV screen at the Russian Mission Control Center in Korolev, Russia a few hours after the Soyuz TMA-12M docked to the International Space Station on Friday, March 28, 2014. Artemyev boarded the ISS with fellow crew members Soyuz Commander Alexander Skvortsov of Roscosmos, and Flight Engineer Steve Swanson of NASA. The crew of three launched at 3:17 a.m. Kazakhstan time on Wednesday, March 26 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Joel Kowsky)

A view of the International Space Station is seen from the Soyuz TMA-12M on the screen of the Russian Mission Control Center in Korolev, Russia as the spacecraft docks to the Poisk module, Friday, March 28, 2014. The Soyuz TMA-12M with Expedition 39/40 crew members, Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, Flight Engineer Steve Swanson of NASA and Flight Engineer Oleg Artemyev of Roscosmos launched from the Baikonur Cosmodrome in Kazakhstan two days earlier. The Soyuz crew members will be greeted by Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency, JAXA, Flight Engineer Mikhail Tyurin of Roscosmos, and Flight Engineer Rick Mastracchio of NASA, who have lived in the orbital laboratory since November of 2013. Photo Credit: (NASA/Joel Kowsky)

Head of the Russian Federal Space Agency, Anatoly Perminov, talks to the crew of the International Space Station (ISS) from the Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Photo Credit: (NASA/Bill Ingalls)

Spaceflight Participant Guy Laliberté is in the foreground as the entire crew onboard the International Space Station (ISS) is seen on a screen in the Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Photo Credit: (NASA/Bill Ingalls)

The entire crew onboard the International Space Station (ISS) can be seen on a screen of the Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Photo Credit: (NASA/Bill Ingalls)

A television screen as seen from the balcony of the Russian Mission Control Center in Korolev, Russia shows the view from Soyuz TMA-12M as it docks to the International Space Station on Friday, March 28, 2014. Onboard the Soyuz spacecraft are Expedition 39 Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, Flight Engineer Steve Swanson of NASA and Flight Engineer Oleg Artemyev of Roscosmos. The crew of three launched at 3:17 a.m. Kazakhstan time on Wednesday, March 26 from the Baikonur Cosmodrome in Kazakhstan. Photo Credit: (NASA/Joel Kowsky)

A view of the International Space Station is seen from the Soyuz TMA-12M on the screen of the Russian Mission Control Center in Korolev, Russia as the spacecraft docks to the Poisk module, Friday, March 28, 2014. The Soyuz TMA-12M with Expedition 39/40 crew members, Soyuz Commander Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, Flight Engineer Steve Swanson of NASA and Flight Engineer Oleg Artemyev of Roscosmos launched from the Baikonur Cosmodrome in Kazakhstan two days earlier. The Soyuz crew members will be greeted by Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency, JAXA, Flight Engineer Mikhail Tyurin of Roscosmos, and Flight Engineer Rick Mastracchio of NASA, who have lived in the orbital laboratory since November of 2013. Photo Credit: (NASA/Joel Kowsky)

The entire crew onboard the International Space Station (ISS) can be seen on the center screen of the Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Charles Bolden, Left, and Ambassador of the United States of America to the Russian Federation, John Beyrle arrive at the Mission Control Center Moscow in Korolev, Russia to watch the docking of the Soyuz TMA-16 spacecraft with the International Space Station (ISS) marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Laliberté will return to Earth with the Expedition 20 crew on October 11, 2009. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Charles Bolden, Left, and Head of the Russian Federal Space Agency, Anatoly Perminov listen to reporter's questions during a press conference at Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station (ISS) marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Laliberté will return to Earth with the Expedition 20 crew on October 11, 2009. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Charles Bolden, right, holds the phone while Head of the Russian Federal Space Agency, Anatoly Perminov, talks to the crew of the International Spacer Station (ISS) from the Mission Control Center Moscow in Korolev, Russia shortly after the successful docking of the Soyuz TMA-16 spacecraft with the International Space Station marking the start of Expedition 21 with Flight Engineer Jeffrey N. Williams, Expedition 21 Flight Engineer Maxim Suraev, and Spaceflight Participant Guy Laliberté, Friday, Oct. 2, 2009. Photo Credit: (NASA/Bill Ingalls)

A view from the balcony of the Russian Mission Control Center shows live television of the Expedition 39 crew members gathered together on the International Space Station a few hours after the Soyuz TMA-12M spacecraft docked on Friday, March 28, 2014, in Korolev, Russia. Pictured are Expedition 39 crew members Flight Engineer Steve Swanson of NASA, left, Commander Koichi Wakata of the Japan Aerospace Exploration Agency, JAXA, back left, Flight Engineer Alexander Skvortsov of the Russian Federal Space Agency, Roscosmos, front center, Flight Engineer Rick Mastracchio of NASA, back center, Flight Engineer Mikhail Tyurin of Roscosmos, back right and Flight Engineer Oleg Artemyev of Roscosmos, front right. Swanson, Skvortsov, and Oleg's arrival to the International Space Station comes two days after they launched from the Baikonur Cosmodrome in Kazakhstan. Photo Credit (NASA/Joel Kowsky)