The March 11, 2011 earthquake and resulting tsunami in Japan caused massive loss of life and property destruction on the northern coast and islands. In that same hard-hit vicinity, on the coast, is located the Fukushima I Nuclear Power Plant, which was flooded by the tsunami, and suffered a loss of backup power that led to a major emergency. A month later, on April 11, the Fukushima accident was classified as a Level 7 on the International Nuclear and Radiological Event Scale – the same level assigned to the Chernobyl accident in Russia in 1986. The hosts discuss the Fukushima I accident, and its implications for nuclear plant design, with Elmer Lewis, Professor Emeritus of Mechanical Engineering at Northwestern University. A frequent consultant to Argonne and Los Alamos National Laboratories, Dr. Lewis is author of the books Nuclear Power Reactor Safety and Fundamentals of Nuclear Reactor Physics