Japan Struggles to Avert Disaster

At 11 this morning, Prime Minister Naoto Kan warned his people there was "a very high risk" of further radiation leakage from the damaged nuclear complex in Fukushima. By midnight, there were reports that radiation levels were down. We look at the consequences of Japan's ongoing disaster for nuclear power in the US and elsewhere. Also, an update from Sendai, the city closest to the earthquake's epicenter, and General David Petraeus says progress is "steady but fragile" in Afghanistan.