150415-N-HU377-043 NATIONAL HARBOR, Md. (April 15, 2015) Secretary of the Navy (SECNAV) Ray Mabus delivers remarks during a luncheon at the 2015 Sea-Air-Space Exposition. 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 3rd Class Dustin Knight/Released)