The centennial HC-144 Ocean Sentry airplane and MH-60 Jayhawk helicopter fly over the sand dunes off the coast of Provincetown, Massachusetts, Monday, Dec. 16, 2019. Coast Guard Air Station Cape Cod will celebrate 104 years of aviation in Mass. and 50 years on Cape Cod. (U.S. Coast Guard photo by Petty Officer 2nd Class Nicole J. Groll)