160518-N-HU377-006 NATIONAL HARBOR, Md. (May 18, 2016) RADM Samuel Cox (Ret.), Director, Naval History and Heritage Command and Curator of the Navy, delivers a speech during the ?21st Century Heritage: Seizing History?s Lessons to Tackle Today?s Leadership and Technology Challenges? roundtable discussion during the 2016 Sea-Air-Space Expo. The Sea-Air-Space Exposition is an annual event that brings together key military decision makers, the U.S. defense industrial base and private-sector U.S. companies for an innovative and educational maritime based event. (U.S. Navy photo by Mass Communication Specialist 2nd Class Dustin Knight/Released)