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The confidential internal reports, obtained by The New York Times, offer an unusually candid view of safety and maintenance concerns within the world’s largest offshore drilling company
The new documents also shed light on one of the lingering mysteries of the disaster: why the rig sank. They indicate that there were problems with the Deepwater Horizon’s ballast system that was responsible for keeping the rig afloat and stable. If the rig had not sunk, the leak might not have occurred