On [[Earth Day]] 2010, a British Petroleum-leased oil drilling rig sank to the bottom of the [[Gulf of Mexico]] two days after it exploded, creating what has been described as the "worst environmental disaster in [[American History Lectures|US history]]."<ref>[http://www.examiner.com/x-33986-Political-Spin-Examiner~y2010m4d29-Worst-environmental-disaster-in-US-history-Oil-slick-in-Gulf-of-Mexico-is-set-on-fire Worst environmental disaster in US history,] Maryann Tobin, ''Examiner'', April 29, 2010.</ref> | On [[Earth Day]] 2010, a British Petroleum-leased oil drilling rig sank to the bottom of the [[Gulf of Mexico]] two days after it exploded, creating what has been described as the "worst environmental disaster in [[American History Lectures|US history]]."<ref>[http://www.examiner.com/x-33986-Political-Spin-Examiner~y2010m4d29-Worst-environmental-disaster-in-US-history-Oil-slick-in-Gulf-of-Mexico-is-set-on-fire Worst environmental disaster in US history,] Maryann Tobin, ''Examiner'', April 29, 2010.</ref> |