All y'all worrying about air defense nuke missile airbursts ought to
get a copy of "The Effects of Nuclear Weapons" and in (my 1957 copy)
Chapter 9 you will learn a lot about fallout. The drift of the fallout
in a wind is something quite disturbing, even in a 15 mph wind, which
for a 1 MT fission weapon results in lethal dosages hundreds of miles
downwind. That was why NORAD went to 'bombkiller' nuclear missiles, to
try to prevent that from happening.
Walt BJ