In this photo provided by NASA, Expedition 26 Commander Scott Kelly wears a blue wristband that has a peace symbol, a heart and the name "Gabby" to show his support for his sister-in-law, U.S. Rep. Gabrielle Giffords, as he rested onboard a Russian Search and Rescue helicopter shortly after he and fellow crew members Oleg Skripochka and Alexander Kaleri landed in their Soyuz TMA-01M capsule near the town of Arkalyk, Kazakhstan, on Wednesday, March 16, 2011. NASA Astronaut Kelly, Russian Cosmonauts Skripochka and Kaleri are returning from almost six months onboard the International Space Station where they served as members of the Expedition 25 and 26 crews. (AP Photo/NASA, Bill Ingalls) MANDATORY CREDIT
In this image provided by NASA the space shuttle Discovery is seen from the International Space Station as the two orbital spacecraft accomplish their relative separation on March 7, 2011 after an aggregate of 12 astronauts and cosmonauts worked together for over a week. The area below is the southwestern coast of Morocco in the northern Atlantic. During a post undocking fly-around, the crew members aboard the two spacecraft collected a series of photos of each other's vehicle. Discovery ended its nearly 27-year flying career when it landed Wednesday. (AP Photo/NASA)
In this image provided by NASA the space shuttle Discovery is seen from the International Space Station as the two orbital spacecraft accomplish their relative separation on March 7, 2011 after an aggregate of 12 astronauts and cosmonauts worked together for over a week. The area below is the southwestern coast of Morocco in the northern Atlantic. During a post undocking fly-around, the crew members aboard the two spacecraft collected a series of photos of each other's vehicle. Discovery ended its nearly 27-year flying career when it landed Wednesday. (AP Photo/NASA)
In this image provided by NASA the space shuttle Discovery is seen from the International Space Station as the two orbital spacecraft accomplish their relative separation on March 7, 2011, after an aggregate of 12 astronauts and cosmonauts worked together for over a week. During a post undocking fly-around, the crew members aboard the two spacecraft collected a series of photos of each other's vehicle. Discovery ended its nearly 27-year flying career when it landed Wednesday. (AP Photo/NASA)
In this image provided by NASA the International Space Station is seen from Discovery backdropped against clouds over Earth, as the two orbital spacecraft accomplish their relative separation on March 7, 2011, after an aggregate of 12 astronauts and cosmonauts worked together for over a week. During a post undocking fly-around, the crew members aboard the two spacecraft collected a series of photos of each other's vehicle. Discovery ended its nearly 27-year flying career when it landed Wednesday. (AP Photo/NASA)
This image provided by NASA and photographed Sunday March 6, 2011, by an Expedition 26 crew member on the International Space Station shows Earth's thin line of atmosphere and a gibbous moon. (AP Photo/NASA)
Space shuttle Discovery makes its final landing Wednesday after a mission to the International Space Station, its last flight after nearly 27 years of service. It will become a museum exhibit. (Associated Press)
Inside the U.S. space lab Destiny, 12 astronauts and cosmonauts take a break from a very busy week aboard the International Space Station to pose for a joint STS-133 (space shuttle Discovery)/Expedition 26 (ISS) group portrait on Thursday, March 3, 2010. The STS-133 crew members, attired in red shirts, are (from left) NASA astronauts Nicole Stott, Alvin Drew, Eric Boe, Steve Lindsay, Michael Barratt and Steve Bowen. The dark-blue-attired Expedition 26 crew members (from left) are European Space Agency astronaut Paolo Nespoli; Russian cosmonauts Oleg Skripochka, Dmitry Kondratyev (below) and Alexander Y. Kaleri; and NASA astronauts Scott Kelly and Cady Coleman (below). (AP Photo/NASA)
In a photo provided by NASA, the space shuttle Discovery is seen shortly after the Rotating Service Structure was rolled back at launch pad 39A, at the Kennedy Space Center in Cape Canaveral, Florida, on Wednesday, Feb. 23, 2011. Discovery, on its 39th and final flight, will carry the Italian-built Permanent Multipurpose Module (PMM), Express Logistics Carrier 4 (ELC4) and Robonaut 2, the first humanoid robot in space to the International Space Station. (AP Photo/NASA/Bill Ingalls)
