Oops posted too soon. If only one bomb could do all this, why haven't all the other bad guys tried it?
Big talk from a bunch of guys who haven't even dug ONE nuke shelter.
Because the big dogs (Russia, China, etc) know that the EMP would only wreck civilian infrastructure, and the hardened missile silos would soon reply with devastating consequences.
And all the mad islamokazis who care nothing about devastating consequences have no high-altitude delivery vehicle, if they indeed have a bomb at all.
While one bomb, detonated at the right altitude could make a smell of hess of systems with electronic and even electrical components, it would have little effect on military systems, at least the strategic ones, which are hardened against the EMP effects.
Big talk from a bunch of guys who haven't even dug ONE nuke shelter.
IIRC, Iran does have such shelters, up in the northern mountains.