The U.S. President and nearly all his critics agree that the spread of nuclear weapons and the possibility of their seizure and potential use is the greatest danger facing the United States and the world. Looking at the way government and industry officials downplay the risks of civilian nuclear technology and materials being diverted to make bombs, one would get almost the opposite impression. In fact, most governments have made the promotion of nuclear power's growth and global development a top priority. Throughout, they have insisted that the dangers of nuclear weapons proliferation are...