. >> guest: ernest lawrence is all the way on the far-left. i believe you have karl compton, sitting right next to loomis, and arthur compton is next to lawrence. and it was, i think, taken by john (unintelligible). c-span: when you hear the name ernest lawrence, is that the lawrence livermore laboratory? >> guest: yes, it is. c-span: and located where? >> guest: that's located in california. and ernest lawrence was a berkeleyhy and he happened to visit tower house in 1936. he was just one of the many physicists who came for a conference there. he was already, in 1936, a formidable figure. at 1930, he had invented the cyclotron, the first atom smasher, and he was, you know, achieved international acclaim by then. c-span: what's this picture of? >> guest: that is a picture of, i think, the 60 inch cyclotron, which was an even larger atom smasher, which he then built at berkeley. and he had raised money for something called the rad lab, or the radiation laboratory at berkeley. it was a very, very famous physics laboratory where he was experimenti