current book was resisting the temptation, the pressure to think about using nuclear weapons. he said at one point to someone privately, i'd rather my kids be read than dead. never could say that publicly, but he was determined not to get into a nuclear conflict and i think that was in many ways his greatest achievement. >> james swanson, let's talk about conspiracy because everybody else will be in the next ten days or so and have been for 50 years. do you subscribe to any of the conspiracy theories? >> no, i don't, piers. my book on the assassination mentions some but of course, you can't not consider them. i read them all. i own the books. to this day, 50 years later, the evidence points to lee harvey oswalt. no one has disproved the central conclusion of the warren commission. it was oswalt. he fired the three shots in the plaza and killed john kennedy. that's what we know. we know more than the warren