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President Obama makes a fourth trip to the gulf.
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BP announces it will place $20bn in a fund to compensate victims of the oil spill and says it will not pay a shareholder dividend this year.
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The oil ended up reaching all gulf coast states in theU.S.
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President Barack Obama hails "a positive sign".
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Only a fifth of all spilled oil was actually cleaned out of the water
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The US government says the oil spill is officially the biggest leak ever, with 4.9 million barrels of oil leaked.
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The companies responsible granted $319 million in compensation.
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The cost of the spill added up to be $8 million.
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BP blames other companies for the spill.
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On 20 April, the Deepwater Horizon drilling rig exploded in the Gulf of Mexico.
