I have some grave misgivings here - we know the muzzies would dearly like to destroy Uncle Sam and, since 9/11 would have serious difficulty getting to repeat it or anything similar.
Now, given that any plane getting near a city would, in all probability get shot down before it could do any damage, what would be the scenario if a nucular(sic) device were on said plane?
Shoot it down and it goes (very big) bang. So long New York . . . .
They reckon that the info to make a nuke are available via the interweb - all thay need is some fissionable material . . .
I really hope I'm wrong . . . . .