Gulf Oil Spill

It's the largest oil slick in the Gulf of Mexico since 1979, which becomes one of America 's biggest environmental disasters. Even though experts tried to stop the leak, the explosion of Deepwater Horizon tore the oil rig apart, killed 11 of 126 men on board and sent oil toward Louisiana , Mississippi , Alabama and Florida coastlines. This special shows never-before-seen footage obtained from the U.S. Coast Guard, NGC's production crew and emergency response crews of the aftermath.