Undersea explorers said they have found a long-lost U.S. submarine off the coast of Japan that sank during World War II. The USS Grayback was carrying 80 U.S. sailors when it sank in the waters south of Okinawa in February 1944. The ship is credited with sinking 14 enemy ships before it was torpedoed. Private explorers Tim Taylor and Christine Dennison found the Grayback in June and made the announcement ...