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April 20 An explosion killed 11 workers
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it sunk to the bottom of the gulf after burning for 36 hours
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oil was leaking from well 5000ft below surface of gulf
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coast guard warns the oil leak is the worst oil spill in history
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U.S sets fire to oil slick in gulf
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Setback in U.S oil containment bid
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BP may stem oil with gulf balls
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Fresh BP effort to stop leaks
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Gulf oil reaches major current
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Spill is worst in U.S