Question: What if they had a nuke to detonate high in the air to burn out every computer we have? An EMP pulse could wreck us in one blast. How big would such a bomb need be? The power grid might be their target. We do nothing and they will send more.
“Question: What if they had a nuke to detonate high in the air to burn out every computer we have? An EMP pulse could wreck us in one blast. How big would such a bomb need be? The power grid might be their target.”
EMP only work within the line of sight. At 60000 feet that would be a 500 kilometer radius. And even then the EMP blast decreases with the square of the distance.
It’s not high enough. A nuclear bomb would weigh too much to put up in a balloon.