190506-N-FM230-0014 NATIONAL HARBOR, Md. (May 6, 2019) U.S. Coast Guard Deputy Commandant for Operations Vice Adm. Daniel B. Abel speaks during the Future of Aviation panel at the Sea-Air-Space (SAS) Exposition. The annual exposition, hosted by the Navy League of the United States, brings together key military decision makers, the U.S. defense industrial base, and private-sector U.S. companies for an innovative, educational, and professional maritime based event. (U.S. Navy photo by Mass Communication Specialist Seaman Apprentice Richard Rodgers/Released)