Carter Remarks Defense Secretary Ash Carter addresses the Defense Science Board conference in Arlington, Va., Sept. 20, 2016. DoD photo by Air Force Tech. Sgt. Brigitte N. Brantley SHARE: Download: Full Size (0.62 MB) Credit: Tech. Sgt. Brigitte N. Brantley VIRIN: 160920-D-GO396-710A.JPG Photo Gallery