It won't be the US, Russia, France, Israel or the UK that goes nuclear. I doubt China is prepared to self destruct either. It will more likely be North Korea, Iran, India or Pakistan. They have all kept the lid on in spite of their conflicts with each other (India and Pakistan) or North Korea's posturing. If I had to make a prediction, it will be Iran, who is not quite a nuclear power. Thanks to spineless politicians, it will be soon enough. They are driven by the most dangerous motivation, religious zeal. Hopefully the regime will collapse and Iran can go back to being a sane and sensible nation, which is what its people want.