This is disturbing. From Steven Starr at unz.com:
There are 12,000 nuclear weapons in the world: 3 of them can destroy the U.S.
The detonation of a 1.44-megaton W49 nuclear warhead 250 miles above Johnston Island in 1958 resulted in the first recorded high-altitude electromagnetic pulse. The photo was taken 860 miles away in Hawaii, far enough away to prevent severe retinal burns in the eyes of observers in Honolulu (military officials had moved the site of the test from Bikini Atoll because the nuclear fireball could blind people up to 400 miles away).[1]
Late one cold winter night, during a massive winter storm that covers most of the Central and Eastern United States, a 100-kiloton nuclear warhead suddenly explodes 100 miles above Dallas, Texas. Two minutes later, identical nuclear warheads explode over Las Vegas, Nevada, and Columbus, Ohio. Each nuclear high-altitude detonation produces an enormous electromagnetic pulse (EMP); the three EMPs together blanket most of the continental United States.
In a few billionths of a second, the initial EMP E1 waves induce massive voltages and currents into powerlines throughout the three U.S. power grids. Any unshielded modern electronic device plugged into the grid instantly has its circuits fried; this includes all the computers and devices that control the operation of most U.S. critical national infrastructure – including the Emergency Power Systems and active Emergency Core Cooling Systems of at least 26 commercial nuclear reactors. Huge surges of electricity created by the E1 waves wreck the control panels of High-Voltage Substations and destroy the computers at power plants and power distribution centers. The combined effects of this catastrophic damage cause all three U.S. power grids to suddenly collapse.
Back to the primitive?
Cellphone finger junkies and Techno Triumphalists will instantly be demoralized and out of the game.
So much for central databases and the free rainbow stew bubble up AI Wakanda.
Sad trombone or the best laid plans of mice and men.