Why didn't the USA deploy its UFO tier weapons to defend Pentagon against whatever destroyed it's walls on US mainland?

Could it be that all of the USA is just a myth? We think space is fake and nukes are fake because the truth is much worse: USA is fake

Perhaps the conspiracy theories about 9-11 are a coping mechanism by US taxpayers because we can't believe they spent trillions on a military which cannot defend itself.

Imagine all your life you are told that no one can invade the US mainland. Neither the Japanese nor Stalin nor Hitler even came close.

Then suddenly pentagon gets attacked by a bunch of civilians. Pentagon the headquarters of the US military gets attacked

It suddenly puts the Hollywood hype about US invincibility into perspective.

But a generation of movies about forever wars and terrorists immediately rewrote the brief awakening of consciousness about USA fragility people had.