Koide Hiroaki has dedicated his career to preventing a nuclear disaster in Japan. That disaster has now happened. As we learn in this wide-ranging and important interview, the accident often referred to as 3/11 was enormous and in many ways unprecedented. The full scope of the disaster is still unknown, but is clearly on the scale of Chernobyl, placing the amount of radioactive material released into the atmosphere possibly up to 1,000 times the Hiroshima bombing of 1945. Professor Koide's reporting in his many books, interviews, and radio programs is essential reading for anyone wishing to learn the nature and extent of the radiological event of March 2011 and beyond. But early in the interview we learn something else. For while in ways unprecedented, 3/11 is also a part of a historical series of nuclear exposures from the Trinity test in the New Mexico desert in July 1945, to the Castle-Bravo Lucky Dragon Incident of 1954, to Semipalatinsk, to Chernobyl, and to the next sure-to-happen event. In fact, while it is clear that the urgent social, political, and medical task right now is the acute contamination of land, air, sea, and bodies by the Fukushima dai-ichi meltdowns, as Prof. Koide says, as bad as Fukushima is, “a much greater event has already taken place.” His immediate reference is the enormous amount radioactive material released in the atmospheric testing from 1945 to 1980.