HONORARY DEGREE U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, right, congratulates Ryan Crocker, U.S. ambassador to Iraq, on his honorary degree from National Defense University during commencement ceremonies on Fort Leslie J. McNair in Washington, D.C., June 10, 2010. U.S. Navy Vice Adm. Ann Rondeau, president of the National Defense University, left, watches the ceremonies. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 201268-M-FER52-207.jpg Photo Gallery