There's no system foolproof enough to defeat a sufficiently great fool.
I tried to contribute to the defeat of the Soviets. If I contributed 1%, it is 1% of something enormous.
Had we not pursued the hydrogen bomb, there is a very real threat that we would now all be speaking Russian. I have no regrets.
Secrecy, once accepted, becomes an addiction.
Physics is, hopefully, simple. Physicists are not.
No endeavor that is worthwhile is simple in prospect; if it is right, it will be simple in retrospect.