President Barack Obama, Apollo astronaut Buzz Aldrin and Col. Steven M. Shepro, 316th Wing/Joint Base Andrews, walk toward Air Force One, April 15, 2010, at Joint Base Andrews, Md. President Obama left for the Kennedy Space Center in Cape Canaveral, Fla., to announce his new space program. (U.S. Air Force photo by Airman 1st Class Perry Aston) (Released)