Roald Amundsen
Ronald Amundsen is one of the most famous explorers in history. He was the first recorded man who reached the South Pole and was the leader of the first expedition to the North Pole. He also was the first to record a successful journey through the Northwest Passage. While on a rescue mission in the Arctic, he and his crew went missing. Some wreckage was found, but no bodies or major plane wreckage were ever found.
Jimmy Hoffa
Between 1958 and 1971, Jimmy Hoffa was the President of the International Brotherhood of Teamsters (IBT) union. The union grew a lot during that period of time, but Hoffa got involved in some unpleasant things. He was invloved with the mafia and even convicted of several crimes. In late July 1975, he told his family and some friends that he was meeting known mobsters – Anthony Giacalone and Anthony Provenzano. Later that same night, Hoffa called his wife, saying the men were late but he’d wait for them. He never returned home.