OB, thanks for the info.
Patton, my original contention was that at 12 miles radius, we would have been incinerated—which is like what happens when your whole town catches fire at once.
Anyway, at 5MT to 10 MT, a not unthinkable yield for hydrogen air blast detonation over NYC, the results at 12 miles radius were most likely not survivable.
Even if you were in a basement and somehow missed the initial blast effects, the radiation would have gotten you with a fatal exposure in as little as 25 minutes.
...and my contention is that the effects of nuclear war, while horrible, are so far exagerated that it is silly.
Ever notice that both Hiroshima and Nagasaki are still cities?