Union leader Jimmy Hoffa’s might be the most famous disappearance in American history. The longtime Teamsters head was very well-respected by his union members, but was also heavily involved in organized crime. In 1975 Hoffa, who had just gotten out of prison, was planning to meet with two Detroit mobsters as part of his quest to reclaim leadership of the teamsters. Hoffa was waiting for two men in the parking lot of a restaurant the last time he was seen. For decades, Hoffa’s true fate has been hotly debated, with the most famous theory being that he was buried in the end zone of Giants Stadium.