Swearing In Army Gen. Martin E. Dempsey, left, 18th chairman of the Joint Chiefs of Staff, swears in his predecessor, Marine Corps Gen. Joseph F. Dunford Jr., during a ceremony on Joint Base Myer-Henderson Hall in Arlington, Va., Sept. 25, 2015. DoD photo by D. Myles Cullen SHARE: Download: Full Size (1.8 MB) Tags: change of command, dempsey, cjcs, dunford, all images Credit: D. Myles Cullen VIRIN: 150925-D-VO565-452.JPG Photo Gallery