How many surveillance cameras does the Pentagon have?

[Duer 157099]

Seems to me some of their budget should go into more cameras.

There are cameras on almost every intersection nowadays, why so few at the Pentagon?

And the only camera that captured the 9/11 hit caught it at an angle which could plausibly not have captured it because it was going too fast? No cameras on the roof, pointed towards the lawn, caught the plane coming in?

I guess not.