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A brown pelican covered in oil sits on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A brown pelican covered in oil sits on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A brown pelican covered in oil sits on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A brown pelican covered in oil sits on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A brown pelican covered in oil sits on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A brown pelican covered in oil sits on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A bird is mired in oil on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A helicoptor carrying Louisiana Gov. Bobby Jindal flies over the oil-impacted beach at East Grand Terre Island along the Louisiana coast, Thursday, June 3, 2010. (AP Photo/Charlie Riedel)

An Atlantic bottlenose dolphin swims in a lagoon behind yellow protective booming erected by the U.S. Coast Guard, Thursday. June 3, 2010 in Grassy Key, Fla. No oil has arrived, but officials installed hundreds of feet of booms at the Dolphin Research Center as a precaution. (AP Photo/Tony Winton)

Danene Birtell, left, of Tri-State Bird Rescue and Research, Patrick Hogan, right, of International Bird Rescue and Research Center, and Christina Schilleci, background right, clean an oiled pelican from the Deepwater Horizon oil spill in Buras, La., Thursday, June 3, 2010. (AP Photo/Gerald Herbert)

A Brown Pelican is mired in oil on the beach at East Grand Terre Island along the Louisiana coast after being drenched in oil Thursday, June 3, 2010. (AP Photo/Charlie Riedel)

A brown pelican, in the background, and another bird are mired in oil on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A boat approaches a brown pelican floating on oily water off of East Grand Terre Island along the Louisiana coast on Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

A cattle egret is released on June 3, 2010 in Ramah, Louisiana, about ten days after being caught in oil and having been rescued and cleaned. About 80 kilometers (50 miles) from the Sherburne Wildlife Area, a fair distance from where hundreds of their species writhed in an oily grave on the Gulf of Mexico, the cattle egret took its first steps in total freedom, ten days after they were rescued and treated in a coastal rescue center in southern United States. AFP PHOTO / Patrick BAERT

A bird covered in oil flails in the surf at East Grand Terre Island along the Louisiana coast Thursday, June 3, 2010. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico. (AP Photo/Charlie Riedel)

Hermit crabs covered in reddish-brown oil are shown on the coast at Dauphin Island, Ala., Tuesday, June 1, 2010. (AP Photo/Mobile Press-Register, John David Mercer) NO SALES; MAGS OUT

A bird flies above oil on the Gulf of Mexico off of East Grand Terre Island along the Louisiana coast Thursday, June 3, 2010. (AP Photo/Charlie Riedel)

VENICE, LA - JUNE 01: Contract workers from BP ferry oil soaked waste to a pickup point as other workers use skimmers to clean oil from a marsh near Pass a Loutre on June 1, 2010 near Venice, Louisiana. Earlier in the day, U.S. President Barack Obama called the Deepwater Horizon accident the "greatest environmental disaster of its kind in our history." Win McNamee/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

This still image from a live BP video feed shows oil spewing from a fractured BP pipe shortly after it was apparently capped on June 3, 2010 in the Gulf of Mexico. BP chief Tony Hayward said June 3 the company would know in "the next 12 to 24 hours" whether its latest attempt to contain the gushing Gulf oil leak would work. At least 20 million gallons of oil are believed to have spewed into the Gulf of Mexico since an April 20 explosion tore through a BP-leased rig just off the Louisiana coast, making it the worst spill in US history. AFP PHOTO / BP == RESTRICTED TO EDITORIAL USE / NO SALES ==