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[–] TomTheGeek 3 points 13 points (+16|-3) ago 

What's the significance of this?

[–] hels [S] 5 points 16 points (+21|-5) ago 

The steel/concrete core is what prevents a building falling down on itself. The core doesn't break apart and will not 'melt' from a fire.

Think about a fire stories higher that actually could melt steel and break concrete (it can't but we'll pretend). So what happened to the steel/concrete below this? Steel bends and concrete remains the way it is so why did the buildings all collapse straight down?

[–] SweetChicken 1 points 13 points (+14|-1) ago 

Not only that but also turn into a pyroclastic flow? How did all those thousands of tons of concrete simply turn to dust?

[–] l_voated_today 4 points 11 points (+15|-4) ago 

The twin towers were supported by the perimeter framework.

[–] hafen 0 points 9 points (+9|-0) ago 

I heard that the engineering was unique for it's time in that weight was supported by exterior columns.

[–] Pseudonym888 1 points 2 points (+3|-1) ago  (edited ago)

The rate of gravity was accelerated ×3. It took 4.8 seconds to collapse. If you stood on top of a building 1,200 ft dropped a 20 pound anvil it would take 12.8 seconds to hit the ground. Concrete, which is carbon and C4/termite have the same co-efficient of expansion. https://youtu.be/oV0yHn11RDw

The person on that video claims by triggering a c4 detonation all anything concrete/with a 'carbon' molecular structure was instantly turned into dust leading to the remaining suspended structure to neatly pile down in 4.8 seconds. The big white cloud of dust is toxic asbestos which was carried away by the wind but also the suspect reason for the high incidence of cancer cases among first responders /survivors.

9/11 was/is the biggest spectacle I have ever seen in my life. Just to start a perpetual war. Wow

[–] TheAntiZealot 1 points 8 points (+9|-1) ago 

The official 9/11 investigative report states that jet fuel entered the elevator shaft and melted the core of the building, causing it to collapse (in free fall) at the rate of gravity.

[–] bb22 0 points 4 points (+4|-0) ago 

Actually neither the NIST nor the FEMA report say that, but hardly anyone actually takes the time to dig through what they actually said. They're still bullshit, but that wasn't their argument.

[–] Pseudonym888 0 points 3 points (+3|-0) ago 

No. The rate of freefall was accelerated ×3 the normal rate.

[–] Guy_Justsome 6 points -1 points (+5|-6) ago 

It proves the saboteur demolition experts forgot to plant their beam-cutting thermite explosives on the building's support structure.

It narrows down the pool of suspects to "mental retards with dynamite."