the nuclear weapons would have to be exploded so close to the ground that surface material would be sucked into the fireball, ...

The map identifies regions across the US that could be most at risk in the event of a nuclear conflict, with the worst-impacted zones.

The software uses declassified equations and models about nuclear weapons and their effects - fireball size, air-blast radius, radiation zones, and more - to crunch the numbers, then renders the ...