Few points...or opinions...feel free to prove me wrong, honestly it's good for discussion but part of this is reiterating a few points Snowolf made..
1. There is absolutely, positively, no way that the government is telling us everything about what they knew before 9/11, they never do so we can call it right here and now. Anyone that doesn't believe that needs to pull their head out of the sand.
2. What Snowolf said about the bombs/explosions. I heard about it too. I DO NOT see what could be considered or mistaken for a bomb in the office I work in, nor do I see anything that could cause an explosion. I don't see why the fire crews would have any reason to make it up, or mistake something, and if someone can tell me what in an normal office setting can cause a "bomb-like explosion" I'd like to hear it.
3. When there is an order to scramble fighters, they don't wait and hour and a half. This isn't that uncommon to get jets in the air, I'm talking the days and years before the day of 9/11. Cheney said Bush gave the order, which isn't how it works (normally), so the question becomes did bush specifically delay the jets from being in the air? Remember this about the pentagon plane..?
"The plane is 50 miles out.....the plane is 40 miles out, 30, 20"...at 10 whoever it was that was talking to cheney asked if the orders still stand. He said "Of course they do, have you heard anything contrary?". Judging by the time that went by, sounds more like at that point they were going to let the plane hit the pentagon than shoot it down. The way the question was asked, it sounds more to me like someone asking..really, don't shoot it down? than it does to say still shoot it down?. It sounds like someone questioning the decision based on how close the plane was getting to the terrorists target.
I'm not saying 9/11 was planned by our government, but I question if they let it happen.