U.S. Army Gen. Martin E. Dempsey, center right, the chairman of the Joint Chiefs of Staff, talks with U.S. Marine Corps Gen. Joseph F. Dunford Jr., the outgoing commander of the International Security Assistance Force and U.S. Forces-Afghanistan, while visiting Kabul, Afghanistan, Aug. 25, 2014, to attend a change of command ceremony. Dunford formally relinquished command to U.S. Army Gen. John F. Campbell, right, during the event.