This week, Rachelle Saunders spends the hour discussing the disaster at Japan's Fukushima nuclear reactor. She'll examine the impacts on the environment,  public health and the reputation of nuclear power, with Dr. Charles Ferguson, president of the Federation of American Scientists, and former project director of the Independent Task Force on U.S. Nuclear Weapons Policy at the Council on Foreign Relations, and Dr. Rob Tarzwell, specialist in nuclear medicine and psychiatry, and creator of the One Minute Medical School video series.