BP Attempts to Plug Well: Endless Oil, Endless Blame

BP is preparing for "Top Kill," using mud to plug the broken oil well, if it concludes that high pressure won't cause new leaks in a weakened system. The company puts the chance of success between 60 and 70%. Meantime, there's new evidence of warning signs before the explosion and more testimony that federal rules for deep sea drilling amounted to self-regulation. Pressure is building on the Obama Administration to take more decisive action, but there are doubts that it has the expertise or the technology. We get a progress report on "Top Kill," update investigative hearings and hear what's happening to the habitats of fish, birds and people.