Just off the coast of the US state of Texas, the Deepwater Horizon oil platform blew up exactly three years ago.
Vast amounts of oil spilled into the Gulf of Mexico, causing one of the biggest-ever environmental catastrophes.
Video has now emerged that energy giant BP never wanted shown, and there have been accusations of a cover-up.
Al Jazeera's John Terret reports from New Orleans.
Source: Al Jazeera