U.S. Navy veteran Dwane Roy Dreher, 33, disappeared on Nov. 7, 1955, after visiting his father in Mason City, Iowa. Police found his car the next day with his belongings still inside. There were a couple of unconfirmed sightings, but authorities never found the father of three. While there has been no police activity on Dwane's disappearance since 1955, it remains an open investigation.