In his day, American labor union leader James "Jimmy" Riddle Hoffa was one of the most well-known figures in the US. On July 30th, 1975, Hoffa disappeared. He has not been seen, living or dead, since that day. In the decades following his death numerous investigators have tried (and failed) to figure out what exactly happened to this infamous American icon. So what actually happened to Jimmy Hoffa? Tune in to learn more in tonight's Classic episode.

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