Note that this is with the benefit of a past where the Germans didn’t get the bomb, and we know they probably wouldn’t before the end of the war. That was no gu

Note that this is with the benefit of a past where the Germans didn’t get the bomb, and we know they probably wouldn’t before the end of the war. That was no guarantee to these men. In a past where the Germans (or even Soviets, possibly) get the bomb first, you could well have seen these scientists thinking “if only I had worked on that program”.