During the summer of ’51 I was in Urbana, Illinois, the University of Illinois. Sid Dancoff who was one of the people at the institute, invited me to come... invited Keith Brueckner and me, to come and participate in a classified project. It was in connection with the effort to develop a radar system for defense against airplane attacks. And the Korean War was on then, it had started in June 1950 and was still going strong at that time, and it stimulated this project to try to develop this system. But in... in connection with that, the project that Dancoff... with which Dancoff was concerned, involved an institution called the Control Systems Laboratory which wanted to look at problems related to control of a big radar system in a very general way by inviting a lot of biologists, a lot of what we would now call information theorists and so on. And so I got to meet very interesting people from a great variety of fields. It was sort of a... a foreshadowing of the Santa Fe Institute in a way. There were many wonderful biologists including Luca Cavalli-Sforza and Buzzati... or was it Buzzati [sic] or Buzzati? I forget, one or the other. Maybe Buzzati. And... Buzzati-Traverso, I guess was his name... and Colin Pittendrigh and a number of other biologists. And then people who worked on cybernetics like Mackay. I forget whether Warren McCulloch showed up – I think he did. Then Heinz von Foerster, the electrical engineer was a professor at Urbana, so he was around part of the time.