21 of 38: This Wednesday, April 21, 2010 aerial photo shows oil in the Gulf of Mexico, more than 50 miles southeast of Venice on Louisiana's tip, as the Deepwater Horizon oil rig burns. The deepwater oil platform that burned for more than day after a massive explosion sank into the Gulf of Mexico on Thursday, April 22, 2010, turning what is likely a deadly blast into an environmental emergency, with the potential for more than 300,000 gallons of crude to foul the waters every day. ((AP Photo/Gerald Herbert))

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