Assessing the Damage to Japan's Nuclear Neactors

Explosions at Japan’s Fukushima Daiichi nuclear power plant have raised fears of a nuclear disaster. Former chairman of the U.S. Nuclear Regulatory Commission Dale Klein says that another Chernobyl disaster is unlikely. Following the devastating earthquake and tsunami, Japanese authorities are trying to control damaged reactors, learn what is known about the damage, and steps being taken to handle the emergency, with Scientific American Environment and Energy Editor Mark Fischetti and Ohio State University Nuclear Engineering Professor Richard Denning.