Yorktown, Va. (April 27) -- An aviation survival technician (AST) jumps from an HH-60 Jayhawk helicopter from Air Station Elizabeth City during a rescue demonstration for Coast Guard Missions Day at Reserve Training Center Yorktown. AST's are helicopter rescue swimmers, emergency medical technicians and they provide all aircrew survival training to aviators. USCG photo by PA2 Jacquelyn Zettles