Oil giant BP, rattled by a string of industrial accidents, said Wednesday it will shut down and refurbish dozens of North Slope oil wells as part of a multimillion-dollar campaign to improve safety. The shutdown will knock out a big chunk of North Slope production -- about 20,000 barrels a day -- at a time when oil prices are running at historic highs in excess of $60 a barrel. Slope production has averaged 811,000 barrels per day so far this month. But oil field safety trumps high oil prices, and a review of some 2,000 wells in the huge Prudhoe...