Two Marines And Seven Coast Guardsmen Were Killed Oct. 29 In An Aircraft Crash About 15 Miles East Of San Clemente Island. For Reasons That Remain Unclear, A Coast Guard C-130 Plane Looking For A Missing Boater Collided With A Marine Ah-1W Super Cobra Helicopter That Was Escorting Transport Helicopters. A Search Turned Up Aircraft Debris, But No Remains Of The Missing Service Members.