High-altitude balloons, such as the one China has floated over mountain state military bases this week, are considered a key “delivery platform” for secret nuclear strikes on America’s electric grid, according to intelligence officials.

Spy balloons, used by Japan to drop bombs during World War II, are now far more sophisticated, can fly at up to 200,000 feet, evade detection, and can carry a small nuclear bomb that, if exploded in the atmosphere, would shut down the grid and wipe out electronics in a many-state-wide area.

https://www.washingtonexaminer.com/news/washington-secrets/balloons-called-top-delivery-platform-for-nuclear-emp-attack