NATIONAL HARBOR, Md. (August 4, 2021) The Honorable Thomas Harker, Secretary of the Navy (acting) speaks at the 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 Kyleigh Williams/Released)