President Barack Obama delivers the commencement address at the U.S. Air Force Academy, Wednesday, May 23, 2012, in Colorado Springs, Colo.(AP Photo/Pablo Martinez Monsivais)

Associated Press
President Barack Obama delivers the commencement address at the U.S. Air Force Academy, Wednesday, May 23, 2012, in Colorado Springs, Colo.(AP Photo/Pablo Martinez Monsivais)
President Barack Obama delivers the commencement address at the U.S. Air Force Academy, Wednesday, May 23, 2012, in Colorado Springs, Colo.(AP Photo/Pablo Martinez Monsivais)
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