Is atomic bomb scientist James Conant's 'nightmare scenario' taking shape?

James Conant, the American scientist who played a key role in the creation of the first atomic bomb, never regretted dropping it on Hiroshima, Japan, at the end of World War II. But he was afraid of a nuclear standoff, similar to the one brewing today between the United States and North Korea.Now Conant's granddaughter, the best-selling author Jennet Conant, is writing about his life and career in the new book, "Man of the Hour: James B. Conant, Warrior Scientist," published by Simon & Schus