Is it true that an EMP fired 5 miles above American Ground can cripple the US and fry our US computers. I mean, without computers, most of our cars wouldn't be able to run, our power plants would shut down, and we wouldn't be able to fire our nukes. We'd be thrown into the stone ages and millions of people would not be able to survive. Does China have such a powerful EMP and can it fire a missile to the ideal location without it being shot down? If so then electronic warfare is much more terrifying than I thought. I used to think that all I had to fear from it was hackers hacking into our banks and messing with our money.