Hell, I don't know. If the Chinese, Russians or whoever decided the world would be better off without the Great Satan's influence, an anonymously delivered* EMP in the upper atmosphere would knock us back a step or two...
* Like a Boeing 777 'cargo' plane bought on the black market, for example.
'Pretty swallow, cut open the dawn so the sun may rise on this day.'
--Some long-eared freak with a sword
Zoom's spaceshuttle landing video
(This is what happens when you let a rebel fighter pilot land expensive government hardware...)