IF an EMP is as effective as advertised then properly placed EMPS above the US would end the nation. There would be no transportation, no way to feed the cities. Famine would eliminate a huge percentage of the population in a few months. The cities would be finished and the urbanites oozing out to the countryside for food would kill off themselves and a large part of the rural population while severely damaging what agricultural capacity remains after power and transportation are gone. The Airborne laser was the device that could preempt EMPs from coastwise ships. Hussein defunded that already.