Marine Corps Gen. Joseph F. Dunford Jr., the 19th Chairman of the Joint Chiefs of Staff, speaks with Lt. Gen. Terrence O'Shaughnessy, 7th Air Force and Air Component Command U.S. Forces Korea/U.S. Combined Forces commander after landing at Osan Air Base, Oct. 31, 2015. (DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro)