180411-N-CY182-0035 NATIONAL HARBOR, Md. (April 11, 2018) Rear Adm. David Hahn, chief of naval research, takes part in an unmanned autonomous systems panel discussion during the Sea-Air-Space Exposition.The Department of the Navy’s Office of Naval Research provides the science and technology necessary to maintain the Navy and Marine Corps’ technological advantage. (U.S. Navy photo by Bobby Cummings/Released)