By that time, it was the summer of 1942 and Oppenheimer invited a number of people, Felix Bloch, Hans Bethe, a few of his students, Serber, Frinkel, myself, and on my recommendation, Konopinski, to discuss matters. And there, in our conference in Berkeley, I had an opportunity to propose a hydrogen bomb, the design that we had at that time. We had a thorough and long discussion. It was obviously of general interest. In the middle of it, Oppenheimer left for a conference with the head of the Chicago group, with Compton. He reported on what we were doing and what he has said, that is in the record- There are novel possibilities. Even when we have the nuclear explosive, it will not be a simple matter. A major theoretical effort and a major practical effort will be needed. We need a new and separate laboratory to do all this. And this was to be set up at the very secret, remote place at Los Alamos. There was a boys school there that was bought. It was taken over by the Army. And, beginning of '43, we were to start an effort there to make whatever, an atomic bomb, or more. I had some difficulties.