180411-N-YM856-146 NATIONAL HARBOR, Md. (April 11, 2018) Undersecretary of the Navy Thomas Modly gives closing remarks during a luncheon at the 2018 Sea-Air-Space Exposition. The annual event hosted by the Navy League of the United States and brings together the U.S. defense industrial base, private-sector U.S. companies, and key military decision makers for an innovative, educational, and professional maritime based event. (U.S. Navy photo by Mass Communication Specialist 2nd Class Brittney Cannady/Released)