190506-N-FM230-0007 NATIONAL HARBOR, Md. (May 6, 2019) Capt. Greg Rothrock, commanding officer of the U.S. Coast Guard Research and Development Center, delivers remarks during the Space panel at the Sea-Air-Space (SAS) Exposition, May 6, 2019. 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 Seaman Apprentice Richard Rodgers/Released)