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The edge of Cat Island, which has eroded heavily since the Deepwater Horizon oil spill, is seen in Barataria Bay in Plaquemines Parish, La., Wednesday, April 11, 2012. (AP Photo/Gerald Herbert)

Photographer describes Gulf oil spill timeline

AP photographer Gerald Herbert documented the devastation at Cat Island in Barataria Bay, in Plaquemines Parish, La. a month into the Deepwater Horizon oil spill, and returned two years later to find the area in a worse state of deterioration.