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BP shuts biggest U.S. oil field
Oil producer BP began shutting down on Sunday the biggest oilfield in the United States, Alaska's Prudhoe Bay, after discovering a damaged pipeline...Prudhoe Bay is operated by a BP-led group that includes oil majors ConocoPhillips and Exxon Mobil Corp., which itself was involved in Alaska's biggest oil spill when the 11 million-gallon Exxon Valdez tanker was grounded in 1989.