Nikola Tesla's earthquake machine

Tesla is the only person which after his death got raided by the FBI, they seized all of his blueprints, they cleaned out his room, closet, and even took his slippers.

His inventions have since then been perfected over this time. They had all his blueprints and notes. It would be naïve think they did nothing with that information.
https://t.me/awakenedspecies/3759