The ship Edmund Fitzgerald – the biggest carrier on the Great Lakes – and crew of 29 are lost in a storm on Lake Superior while carrying ore from Superior, Wisc. to Detroit. The cause of the sinking was never established - 1975

Window Glass Cutters League of America merges with Glass Bottle Blowers - 1975

Former Teamsters President Jimmy Hoffa disappears. Presumed to be dead, his body has never been found - 1975