The State Department prevented me from traveling for two years. The first time, when the Royal Society of London was holding a two-day conference to discuss my work, I was to be the first speaker [to discuss] work on the structure of protons, an international conference just to discuss these discoveries that I had made. And, I couldn’t go to the conference because I couldn’t get the passport. So for two years, the State Department caused trouble for me. They wouldn’t tell me why. They said “Not in the best interest of the United States,” or “Your anti-Communist statements haven’t been strong enough.” I was having a scrap with the Communists — the Russians and the Soviet Union — at the time, and I was critical of the Soviet Union, but they used that as an excuse, saying they weren’t strong enough, my statements. I’m sure this interfered seriously with my work. When I was awarded the Nobel Prize in Chemistry, The New York Times had an article saying, “Will Professor Pauling be allowed to go to Stockholm to receive this Nobel Prize?” So I received the passport, which had been turned down only a short time before. It was sent to me.