Gulf Oil Spill
This image provided by the U.S. Coast Guard shows a containment boom staged at the Breton National Wildlife Refuge, Thursday, April 29, 2010. The spill _ a slick more than 130 miles long and 70 miles wide _ threatens hundreds of species of wildlife, including birds, dolphins and the fish, shrimp, oysters and crabs that make the Gulf Coast one of the nation's most abundant sources of seafood. (AP Photo/US Coast Guard)
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