Obama: 'Today you step into a different world'

Newly minted Second Lieutenants toss their hats in the air at the conclusion of Air Force Academy graduation Wednesday, May 23, 2012. Photo by Mark Reis, The Gazette Photo by
Newly minted Second Lieutenants toss their hats in the air at the conclusion of Air Force Academy graduation Wednesday, May 23, 2012. Photo by Mark Reis, The Gazette Photo by
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