...as well as a physicist.
Folks, there really is no debate on this one. It's simple physics and engineering. Jet propellant,(henceforth known as JP) burns at a significantly higher temperature than gasoline, kerosene, etc. When I say significantly higher, I mean something on the order of 500-600 degrees F higher. A well-loaded 747 slammed into a 100 story building at, oh, say, 500mph is going to weaken the structural integrity enough on the initial blow, that when combined with several minutes of high heat burn, will cause the supports in the area to collapse.
If you'll recall, when the towers began to drop, there was a big collapse at the top, then sort of a domino effect as they compressed. This is not the result of detonated charges by the government to finance GWBs war for his daddy's oil stocks in Halliburton. This is a result of what happens when you stress materials under weight.
Think of the building as a layer cake. particularly, a many tiered wedding cake. The top layer can hold lots of decorations and things, but nothing of any substantial weight, especially if you drop something on it. Now, imagine if you were to drop a bowling ball on the top layer of the cake. Even if you dropped it from 1/4" above the top layer, the bowling ball would bring the top layer down, which would continue to the next layer, and so on, keeping in mind that the bowling ball isn't plunging through the layers, it's pressing them down. So, every layer that the bowling ball hits, is being added to the total mass of the bowling ball.
Sooner or later, gravity and inertia take over, and the bowling ball/cake mass take exponentially less time to go through the succeding layers, until it hits solid ground.
Kids, I hate to spoil your conspiracy theories, but the government didn't bring down the towers. Terrorists did. They flew two fuel-air bombs into the towers, and they collapsed. Building 7 went down because of it's proximity to the 'blast area' of the two towers. It got shaken like a martini, and didn't stand a chance.
But what do I know, i'm not a mechanical engineer, or a physicist, or even an economist...
The link. First bit down...rest of the bits are interesting reading too...
UPDATE - Dr. Robert Gates - President of Texas A&M University, responds to the allegations by Dr. Morgan Reynolds that the WTC attack was actually a government conspiracy
Dr. Reynolds' foot, meet Dr. Reynolds' mouth.