[tet68]

I think they learned a lesson from the truck bomb which created a large crater but didn't bring it down.Someone with archectural training taught them how.

[Sungirl]

Is Rush psychic? Cover of the Limbaugh Letter August 2001 Uncanny.

[RedBloodedAmerican]

Heat from the jet fuel melted away the internal support, and the top caved in, and collapsed the structure.

Thats it.

[_Jim]

think they learned a lesson from the truck bomb which created a large crater but didn't bring it down.

Ha ha!

You conveniently OVERLOOK those beams/columns DESTROYED by that bomb blast!

BTW, the author of this 'piece' overlooks the effects of heat (the fire) and it's effects on the materials involved (steel and concrete) ...

[independentmind]

I think they learned a lesson from the truck bomb which created a large crater but didn't bring it down.Someone with archectural training taught them how.

Interesting that you should say this. After the OKC bombing, there was a special group formed which examined this exact subject.

[Hoosier Patriot]

Someone with archectural training taught them how.

I tend to agree somewhat. First attempt in '93 failed. Somebody went back and did their homework, and this time were successful.

I am still a bit unclear as to exactly where the first plane struck tower #1. Dead center, (side to side, that is, not top to bottom), or approximately centered between the core and one side, as the second plane seemed to. Second plane appears to have gone in one side and sheared its way through to the point of almost (or perhaps succeeding in) coming out the other. Conflagration ensues, weakening the structure over time to the point of collapse of that floor. All floors above come down, floors below cannot accomodate this sudden weight crashing down from above, and they all pancake down to the ground.

One tower collapsing, perhaps luck plays a role in bringing the whole thing down. Two towers collapsing, damn good luck, or, as I am more inclined to believe, somebody had to have a darn good idea how to make it happen.

And when I refer to luck above, I am strictly referring to the luck running with the maniacal cowards, to accomplish their objective, not to be construed that I was hoping this would happen.

[George W. Bush]

ABC news has some architectural experts who are in agreement that the fires in this building (1500 degrees F) caused the steel to weaken and it then became unable to support the weight once the tensile strength of the steel was depleted. So, the structure was sound enough to withstand the impact. It was just that the loadbearing steel was weakened by the fire. When the top floors fell, it was too much stress for the lower structure and the whole thing collapsed straight down without tipping. Straight down in a pile.

I think within three days, we're all going to be sick of structural analysis.

[tallhappy]

I think they learned a lesson from the truck bomb which created a large crater but didn't bring it down.Someone with archectural training taught them how.

I think so. I think that there may have been bombs set as well.

The coordination of the attacks and the sophistication, like having structural engineers involved in planning underscores the seriousness of this.

I don't think President Bush or any politician has yet enunciated this, or perhaps do not fully grasp it.