[svachalek]

Even sub-city-sized weapons like the ones dropped on Japan are too large to actually launch in the modern world; the political repercussions are much too great. The only use for a nuclear arsenal is to promise Mutually Assured Destruction, and it really doesn't take much for that.

The dangerous super-weapons of the future are small, simple ones that can kill just the right person, anywhere, anytime. That arms race is happening right now, and progress is rapid.