CNN | What we still don't know about Gulf oil spill CNN (CNN) Five years after the Deepwater Horizon rig exploded and unleashed the largest marine oil spill in the nation's history, we are still experiencing -- yet only beginning to truly understand -- its profound environmental and economic repercussions. Oil spill forum draws passionate crowd Five years later: Deepwater Horizon disaster leaves oil and dispersants ... The Deepwater Horizon Gulf of Mexico oil spill was 5 years ago |