President Barack Obama makes a phone call with the crew of the Space Shuttle Discovery and the International Space Station from the Oval Office, March 3, 2011. Listening in the background are, from left: Ted Wackler, Acting Chief of Staff, Office of Science and Technology; Damon Wells, Assistant Director for Aeronautics and Space, Office of Science and Technology; and NASA Administrator Charles Bolden. Official White House Photo by Samantha Appleton