** FILE ** Defense Secretary Chuck Hagel (left) and Army Gen. Martin E. Dempsey (right), chairman of the Joint Chiefs of Staff, arrive for a closed-door intelligence briefing for members of the Senate Armed Services Committee on Capitol Hill in Washington on Wednesday, Sept. 4, 2013. (AP Photo/J. Scott Applewhite)

Photo by: J. Scott Applewhite

** FILE ** Defense Secretary Chuck Hagel (left) and Army Gen. Martin E. Dempsey (right), chairman of the Joint Chiefs of Staff, arrive for a closed-door intelligence briefing for members of the Senate Armed Services Committee on Capitol Hill in Washington on Wednesday, Sept. 4, 2013. (AP Photo/J. Scott Applewhite)