At this point, the proverbial cat is out of the bag. So many nations have nukes that there is no way to hold that back. M.A.D. worked well to keep the Soviets and China from doing a nuclear strike on us, but I'm not so sure about the nut in NK or the nuts in Iran, or for that matter about the nut in the White House. I think it is a real possibility that the U.S. mainland will someday experience one or more major cities utterly destroyed by nukes. If we thought 9-11 was bad, just wait till that happens, if you don't get vaporized by virtue of living in a big city. Unfortunately, the city I live in is big enough to get nuked, so I might be among the first in the history of the U.S. to get vaporized. The odds are still relatively low of it happening, but for the first time in a long time, it has become something in the back of my mind, that this might end up being how I end up going. I'm not worried enough to actually do anything about it. I live in the downtown area, which is good in this case, because if it does happen, it will be a quick death, rather than a long drawn out death from radiation poisoning.
Even for those who live in rural areas, if we get nuked, they're going to have to deal with a scene out of The Walking Dead, only instead of zombies, it will be herds of living hungry desperate people, who in many ways will be far more dangerous than zombies. They will flood in to the rural towns like locusts and take everything they have. That wouldn't be the kind of world I would want to live in, so I am okay with the idea of being among the first casualties in a nuclear war, in the off chance of it actually happening at all. I'm not going to worry about it or do anything to prepare for it. I'm just going to live my life as if it will never happen, and if it does, oh well, poof, I'll gone in a blink of an eye.