I think it's pretty obvious that engineers put explosive charges throughout two of the most used office towers in the world without anybody noticing.
As for plane wreckage. Planes are built light for a reason.
Here's a 747 from last year:
Here's what a small plane looks like after hitting a building:
Le Concorde:
So you can imagine what is left of an aircraft, built as light as possible, after it crashes full speed into the side of the heavily re-enforced Pentagon building. It kinda disintegrates. Obviously. There'd be pieces. Everywhere. Very small ones.
There's probably no footage of the actual plane, or it's very blurry, because they didn't use high speed cameras. I'd guess security camera at 15 frames/second. Maybe less. don't know how much ground that covers, nor what speed aircrat was travelling at. Somebody can do the maths.
In the end it seems far, far more likely that a fanatical terrorist organisation trained some pilots who then hijacked some planes and crashed them into buildings that weren't designed for something like that. Seriously what is so hard to understand about that?
An aside: Bin Laden's goal was to bankrupt America, they spent a truck load on these unnecessary wars. Same way the Afghanis beat the Russians.
