[IMG]http://d.yimg.com/a/p/afp/20100422/capt.p***o_1271959703507-1-0.jpg?x=130&y=82&q=85&sig=TABTRh2ZikS8A6xXaRblZw--[/IMG]AFP - An oil rig off the US state of Louisiana sank Thursday into the Gulf of Mexico causing a major pollution risk two days after a massive explosion.
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