U.S. Army Gen. Martin E. Dempsey, center, the chairman of the Joint Chiefs of Staff, speaks with U.S. Marine Corps Gen. Joseph F. Dunford Jr., right, the outgoing commander of the International Security Assistance Force and U.S. Forces-Afghanistan, while attending a change of command ceremony in Kabul, Afghanistan, Aug. 26, 2014. Dunford formally relinquished command to U.S. Army Gen. John F. Campbell during the event.