Joint Chiefs Chairman Gen. Martin Dempsey speaks during an interview with The Associated Press at the Pentagon in Washington, Wednesday, June 24, 2015. The man often called America’s top military officer, the most powerful person in uniform, actually commands nothing. No tanks, no planes, no ships, no troops. His voice carries great weight, but he gives no combat orders. As chairman Dempsey is the public face of the military, but he is not in the formal chain of command linking the president to his commanders in the field. Dempsey, who is completing four years in the job, has said it reminds him of entering the Army as a lowly second lieutenant. (AP Photo/Susan Walsh)