Times (UK): It was shortly before noon on April 20, only ten hours before a torrent of crude oil ripped through the Deepwater Horizon rig, that the quarrel broke out. “There was a slight argument that took place and a difference of opinions,’ Doug Brown, the rig’s chief mechanic and a survivor of the accident to come, told a federal board of investigators last week in Kenner, Louisiana. In a room next to the rig’s galley three employees of Transocean, owner of the Deepwater Horizon, and …