CASSELTON, N.D. (AP) -- Boomer may be a buster: Measuring 3 feet tall at the shoulders and 7 feet long from nose to destructive wagging tail, he might be the world's tallest living dog. Owner Caryn Weber says her 3-year-old Landseer Newfoundland keeps all four paws on the floor when he drinks from the kitchen faucet in her family's eastern North Dakota farm house....