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US sets fire to oil slick in Gulf.
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Underwater oil plumes "spreading."
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US Gulf oil drilling ban blocked.
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Gulf oil leak tar balls hit Texas.
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Temporarily shut off the oil flow in order to test the well.
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Oil spill vessels return to site.
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4.9 million barrels of oil leaked before the well was capped.
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Us to require oil drilling review.
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A study published in a leading scientific journal confirms the presence of a toxic chemical residue.
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BP pumps cement to seal damaged well after it was intercepted by a relief well.
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BP pumps cement to seal the damaged well after it was intercepted by a relief well.
