HONOLULU, Aug. 28 — Researchers said Wednesday they found a Japanese midget submarine sunk more than an hour before the attack on Pearl Harbor. Discovery of the 78-foot vessel could provide the first physical evidence to back U.S. military assertions that it fired first against Japan in World War II and inflicted the first casualties.>p> THE SUB was sunk by a Navy destroyer on Dec. 7, 1941. Two Japanese crewmen are believed still inside the submarine. “It’s the shot that started World War II between the Americans and the Japanese,” said John Wiltshire, associate director of the Hawaii Undersea Research...