That is a fascinating website. It takes into account a relatively small yield device (100 KT) and a ground level burst, both of which would be emblematic of a terrorist attack. I played a bit with the numbers, and I would guess the projected casualties in my area would increase at least 100 fold if you increase the yield to 1 MT.

It's a good thing that nations typically do not resort to WMD to resolve differences, particularly thermonuclear devices. Imagine if the Russians and Americans were still eyeballing each other in the current world climate? Both countries were--and are--quite skilled at depositing thousands of MIRV'd warheads 1 mile above each others cities.

Compared to what we faced then, surviving now is a piece of cake. <img src="/images/graemlins/ooo.gif" alt="" />