170403-N-PO203-161 NATIONAL HARBOR, Md. (April 3, 2017) Rear Adm. David Hahn, center, chief of naval research, takes part in a panel discussion on innovation for operational excellence during the 2017 Sea-Air-Space Exposition. Sea-Air-Space is hosted by the Navy League of the United States with the goal of bringing together leaders from defense organizations, both government and private industry, to learn about and view the most up-to-date information and technology related to maritime policy. (U.S. Navy photo by John F. Williams/Released)