A super-submarine left over from the Second World War has been found in Hawaii. But according to a historian Dr Hans Van Tillburg "the I-201 submarine was nothing like anybody had in the Second World War. It had a streamlined body and conning tower and retractable gun." In fact the submarine more closely resembles a Cold War submarine than something from the Second World War. “Japan wanted to use these ships to launch aerial attacks in the continental United States. To do this, it used three Aichi light bombers, each capable of carrying an 800-kilogram bomb. When their mission was complete, the bombers returned to the submarine, landing on the water using floats,” according to Gizmodo.