Six years before Deepwater ... Horizon. When it exploded, a couple of crew members tried to engage the blowout preventer, which had failed to do so automatically. The four-story containment ...

Then, a 5,000-foot (1,524 meters) riser will be connected to the top of the containment dome, and that riser will go up to the Deepwater Enterprise. Once sealed to the seabed, it will take a ...