FILE - In this Saturday, July 31, 2010 file picture, a ribbon of oil lines the bottom stalks of marsh grass at low tide in a cove in Barataria Bay on the coast of Louisiana. An April 20, 2010 ... more 
FILE - In this Saturday, July 31, 2010 file picture, a ribbon of oil lines the bottom stalks of marsh grass at low tide in a cove in Barataria Bay on the coast of Louisiana. An April 20, 2010 explosion at the BP Deepwater Horizon offshore platform killed 11 men, and the subsequent leak released an estimated 172 million gallons of petroleum into the Gulf of Mexico. less 
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Associated Press | Photo By Patrick Semansky
Wed, Apr 20, 2011 10:09 AM EDT