BRANSON, Mo. — The country-and-western tourist town of Branson, Missouri, mourned Friday for more than a dozen sightseers who were killed when a duck boat capsized and sank in stormy weather in the deadliest such accident in almost two decades. Divers found four more bodies in Table Rock Lake, bringing the death toll to 17, including nine people from the same family and the crew member who was driving the amphibious boat.