U.S. Marine Corps Gen. Joseph F. Dunford Jr., chairman of the Joint Chiefs of Staff, receives a briefing from U.S. Army Col. James Minnich, secretary of the U.N. Command Military Armistice Commission, during his visit to the Demilitarized Zone in South Korea, Nov. 2, 2015. DoD photo by U.S. Navy Petty Officer 2nd Class Dominique A. Pineiro