One Year After Oil Spill, Admiral Reflects on Continued Impacts

It's been nearly a year since the BP oil spill began. But to this day, it's difficult to measure the environmental impact of the disaster. As the National Incident Commander for the federal response to the oil spill, Admiral Thad Allen has intimate knowledge of what became one of the largest spills in U.S. history. Host Michel Martin speaks with him about the aftermath of the spill and the lessons the U.S. can learn from the experience.