U.S. Marine Corps Sgt. Maj. Bryan B. Battaglia, left,

U.S. Marine Corps Sgt. Maj. Bryan B. Battaglia, left, the senior enlisted adviser to the chairman of the Joint Chiefs of Staff, talks with personnel with his office and the National Defense University who helped publish the book "The Noncommissioned Officer and Petty Officer: Backbone of the Armed Forces" during an event for the book's rollout Dec. 17, 2013, at the Pentagon in Arlington, Va. Chairman of the Joint Chiefs of Staff Army Gen. Martin E. Dempsey delivered the keynote speech for the unveiling of the book, which was written by a team of active, reserve and retired U.S. military senior enlisted leaders to serve as an educational and developmental tool for noncommissioned officers and petty officers. (DoD photo by Staff Sgt. Sean K. Harp, U.S. Army/Released)