Eighteenth Chairman of the Joint Chiefs of Staff U.S. Army Gen. Martin E. Dempsey delivers remarks at his retirement and change of responsibility ceremony on Joint Base Myer-Henderson Hall, V.A., Sept. 25, 2015. Dempsey retires from the military after 41 years in service and is succeeded by Marine Gen. Joseph Dunford. Department of Defense Photo by Petty Officer 2nd Dominique A. Pineiro