david greenglass was a machinist. he was in the army, as i was. luckily for me i do not associate with him because i didn't like him. >> did you know ted hall? murray: no, i did not know ted hall. well, i probably met him. when he became famous later, i barely remembered him. >> the bomb, and the race with the germany [indiscernible] murray: should we have built that bomb? and having built it, should we have used it? these are issues which are just the reflections of a person who has been thinking about it for many years. it has little to do with my experience directly at los alamos. i was not part of any of these decision processes. it was known, not by us, that the germans had given up, i think -- around 1942, i think, certainly around 1934 -- 1944. racing against the germans was some powerful incentive to work on it. we certainly knew when the war ended that we were no longer in a race with germany. we continued work on it at the same pace, taking the experimenters, taking the same deadly risks without giving it a moment's thought, most of us.