Chairman of the Joint Chiefs of Staff U.S. Army Gen. Martin E. Dempsey, left, speaks with U.S. Air Force Gen. Philip M. Breedlove, right foreground, the Supreme Allied Commander Europe of NATO Allied Command Operations and the commander of U.S. European Command, and other NATO Military Committee counterparts in Brussels May 21, 2014. The alliance of 28 member-country chiefs discussed military issues, including the way ahead in Afghanistan and Ukraine. (DoD photo by Staff Sgt. Sean K. Harp, U.S. Army/Released)