Embedded Player It's been one year since the Deepwater Horizon oil rig exploded and sank, killing 11 workers and spilling 5 millions barrels of oil into the Gulf of Mexico. Host Liane Hansen talks with John Konrad, author of Fire on the Horizon: The Untold Story of the Gulf Oil Disaster. Konrad is a veteran oil rig captain, and in the book he recounts the life of the rig, from its construction to its disastrous end.