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

Photo by: Gerald Herbert

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