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U.S. Navy SEAL Eric Greitens, CEO of The Mission Continues delivers the commencement address at Tufts University’s 156th Commencement on Sunday, May 20, 2012 (Credit: Tufts University/Alonso Nichols)

U.S. Navy SEAL Eric Greitens, CEO of The Mission Continues delivers the commencement address at Tufts University's 156th Commencement on Sunday, May 20, 2012 (Credit: Tufts University/Alonso Nichols)