Nuclear High-Altitude Electromagnetic Pulse

One high-altitude nuclear detonation will create a massive electromagnetic pulse that can bring down the U.S. national power grid and keep it down for many months, perhaps a year or longer.  Americans would instantly find themselves without running water, food, refrigeration, lights, phones, functioning toilets and sewage systems, air conditioning and heating, transportation (no gasoline), and without access to their bank accounts or medical services. A nuclear high-altitude electromagnetic