Los Alamos. It was a new undertaking. It was something rather different from going to a university and changing one research from one topic to enough- to a somewhat different topic. What was the motivation of all of us? I don't know. I know something about myself. Even what brought me to Chicago and what drove me from Chicago to Los Alamos. Because, in fact, I was not happy about any of this. What I had been doing in pure physics was wonderful. What we are now setting up, up to do was something very, very different. And I want to tell you about one of my thorough motivations and also how one of my friends, Eugene Wigner, felt about all of this. As far as I am concerned, I took an increasing ins- interest, not really, I'm sorry to say, not from the time of Hitler invading Poland, but a little bit later, when he invaded the West, Belgium. I was still, at that time, in Washington and there was a conference, an international conference, no, an inter-American conference to be exact, that Roosevelt was to address. And against my usual habit, I did not miss an op- opportunity to hear a politician, because of the invasion of Hitler of the Netherlands, Belgium, by Hitler. That was a few months after Einstein has written to Roosevelt and Roosevelt asked our opinion. Roosevelt talked about the dangers, not to Western Europe; the dangers to the whole world. He made a point of how much- how smaller, how much smaller the world had become, that from century to century, from decade to decade, politics here and there were coupled more closely. And then he concluded, in a remarkable fashion. He said- I know that you will be told that without the new weapons of science, the danger would hardly exist. I am telling you that this is in a great measure true, but at the same time, it is true that if you scientists don't work on weapons, the National Socialists will conquer the world. I listened. I had a strange feeling that Roosevelt was talking to me. We never met. But I may have, been among the couple of thousand people in the audience, I may have been the only one who knew of the letter that Roosevelt got, who knew that among the new weapons Roosevelt had the atomic bomb in mind. So that was a part of my motivation.