I didn't know all the details. From the very beginning and even before I arrived, the notion was in the air, so that I was pretty well convinced before I got to Berkeley that that's what the laboratory was doing, although nobody specifically told me. After I got here, they confirmed what I already knew. Yes, it's a natural question. You talk a little about that in the book.
Second thoughts are all after the fact.
But that's only the beginning of the question. And contributing to getting the war over at the earliest possible date seemed like a very important and noble cause. Now, when it all happened, that is, when Hiroshima was destroyed and then Nagasaki, and then the emperor surrendered, we were glad it happened, because it did end that terrible war. The young group that I was associated with was not really privy to the discussions going on at high national and political levels, but I soon came to learn about them later. I came back to Berkeley from Oak Ridge, which is where I was most of the war, to join the Physics Department here.