U.S. Army Gen. Martin E. Dempsey, 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 (ISAF) and U.S. Forces-Afghanistan, while visiting ISAF headquarters in Kabul, Afghanistan, Aug. 25, 2014, to attend a change of command ceremony. Dunford formally relinquished command to U.S. Army Gen. John F. Campbell during the event.