Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, talks with the graduating class of cadets during his visit to the U.S. Military Academy at West Point, N.Y., April 22, 2015. Dempsey is on a two-day tour of the U.S. Naval Academy, U.S. Military Academy and Harvard University. DoD photo by U.S. Navy Petty Officer 1st Class Daniel Hinton