President Barack Obama talks with the crews of the Space Shuttle Atlantis and the International Space Station during a phone call in the Oval Office, Friday, July 15, 2011, in Washington. (Official White House Photo by Pete Souza)
President Barack Obama talks with the crews of the Space Shuttle Atlantis and the International Space Station during a phone call in the Oval Office, Friday, July 15, 2011, in Washington. (Official White House Photo by Pete Souza)