NATIONAL HARBOR, Md. (Aug. 3, 2021) A model of the future aircraft carrier PCU John F. Kennedy (CVN 79) is displayed 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)