I have a friend that works in the big library

down there, and when he came up to visit he described basically a police state & security everywhere, etc..
I wouldn't be surprised if they restricted media from the Pentagon site.
But I agree that something is kinda fishy. But then again, I think the reason you only see the towers is because the media is trying to milk the whole situation for all they can. Most people care more about the towers due to they actually getting completely destroyed and the quite larger loss of life.