Back in the day, of course, our various Merkin Muffleys could declare that it was "the avowed policy of the United States never to strike first with nuclear weapons," which was always a bit of self-congratulatory moral posturing, since the United States was the only country ever to have struck with nuclear weapons regardless of the preceding ordinal qualifier. But still.
But let us not forget, 9/11 changed everyting.
And thus do we find ourselves, one Soviet threat down but a billion Muslims to go, "rethinking nuclear policy."
Boy, I sure wish we had one of them Doomsday devices.