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There ARE advanced projects. There IS no "breakaway civilization." This is a dumb meme.
It's all still under the aegis of the United States government. America is the greatest empire of them all, and it will be the last empire, because America commands technology and power that no one else can dream of. But most of the people who run it are still pretty loyal to the United States.
We have done a fair amount of reverse-engineering from recovered craft, in addition to our own considerable advancements. It's to the point that there is probably nothing on Earth more powerful than some of our aircraft.