President Obama is silhouetted as he congratulates a graduate of the 2012 class of the U.S. Air Force Academy in Colorado Springs, Colo., on May 23, 2012. (Associated Press)
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President Obama is silhouetted as he congratulates a graduate of the 2012 class of the U.S. Air Force Academy in Colorado Springs, Colo., on May 23, 2012. (Associated Press)
