In this aerial photograph, a supply vessel moves near an oil rig in the Gulf of Mexico damaged by an explosion and fire, Friday, Nov. 16, 2012, about 25 miles southeast of Grand Isle, La. Four people were transported to a hospital with critical burns and two were missing. (AP Photo/Gerald Herbert)

Associated Press
In this aerial photograph, a supply vessel moves near an oil rig in the Gulf of Mexico damaged by an explosion and fire, Friday, Nov. 16, 2012, about 25 miles southeast of Grand Isle, La. Four people were transported to a hospital with critical burns and two were missing. (AP Photo/Gerald Herbert)
In this aerial photograph, a supply vessel moves near an oil rig in the Gulf of Mexico damaged by an explosion and fire, Friday, Nov. 16, 2012, about 25 miles southeast of Grand Isle, La. Four people were transported to a hospital with critical burns and two were missing. (AP Photo/Gerald Herbert)
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