i wonder why they would have blast resistant windows and kevlar reenforced concrete walls on an office building?
Y'know what I wonder about? I wonder if you wonder truly about anything. In every situation your "questions" are framed so as to point to a specific answer, the answer you want. In every situation your "statements of fact" turn out, upon close examination, to be non factual. (A prime example is your contention that a large airliner is incapable of maintaining lift very close to the ground.)
What are the protocols for the defense of the Pentagon?
According to you it's obvious. To simply blast any possible threat to smithereens without thought or deliberation.
Why does the Pentagon have blast resistant windows and kevlar concrete walls?
Surely to protect against missile or missile like attacks. Other obvious possibilities seem to evaporate to you. Did you know that some embassy buildings for example have similar protections? Did you know that some corporate buildings do too?
What was or is the Pentagon prepared for in the nature of some kind of attack?
Surely the Pentagon was and is prepared for every kind of possible attack. After all its the Pentagon! The very fact that an attack succeeded is proof positive that something else had to be at work.
In the end your suspicions are based on absolutely nothing but your own expectations of what should be or should happen given a set of circumstances. You then mockingly and quite arrogantly elevate your thoughts to some sort of self evident concept like cause and effect and berate others for not seeing the obvious.
You have managed, it seems, to construct a kind of "meta truth" which allows you to see through plain old truth. I'd like to know how you did it. When I tried, it gave me a headache.