Before the war I was working on a very dull problem which I didn’t really select myself, which had been selected by my professor. And I was building an apparatus, which is something I’m not particularly good at, but I did it. And I would have had to go back after the war and finish that but for the lucky fortune… lucky chance that the thing was blown up by a… a land mine during the war. So I didn’t have to go back and start all over again and… do it… and… and finish it, I should say. And I didn’t want to go back and start all over again. So, what the war gave me, essentially, was a chance to interact with some good scientists, to make me think about what I wanted to do, and gave me an opportunity at what you might call a second start, where I could really think what I was interested in, which would have been very difficult to do when you were younger because when you’re younger, usually, although you have a certain bias, you… you follow the, sort of, next step in the professional path. You… and… by the time you get to the age that I was of about 30, you’re… you’re getting just well established, and you don’t feel you want to make a change. On the other hand, it’s actually a very good time to make a change, in some ways, but, of course, you have lost those very key years of… of the twenties… in your twenties.