The remarkable thing about the work at Livermore is precisely the fact that it has so many aspects: big explosions, small fission explosions as has been developed very highly by John Foster who was for a while our director. So was Harold Brown, so was John Nuckolls who had a lot to do with the peculiar development of light, the exponential increase in the laser light intensity and its uses. Now all of this has led to a further and I believe extremely important development; not weapons of attack, but for once the possibility of very real defense. It might be a good idea to talk about that in connection with an important event in Livermore. In the late 1960s, when Ronald Reagan became Governor of California, I invited him to come and visit the remarkable weapons laboratory in California. He came and we talked for a few hours about one of our, at that time, novel approaches to stop incoming missiles. Now Governor Reagan as he was at that time, listened very attentively, asked - I don't know - in two or three hours maybe a dozen questions clearly showing that the subject was new to him and equally clearly showing that he was making a successful attempt to understand it. Here was a topic on which I testified to Congress in February 1946: we must be able to stop incoming objects, planes, projectiles. How to do it? It was not something that was discovered in one special way; it was an accumulation of a great variety of approaches. To begin with, we relied quite heavily on the possibility to use nuclear explosives on the incoming objects but as time went on we got more and more interested in a defense that was not based so much on the size of the defensive explosion, but on the great accuracy of its delivery.