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In reply to the discussion: Luxury skyscraper hotel completely engulfed by fire in Grozny, Chechnya (VIDEO, PHOTOS) [View all]AtheistCrusader
(33,982 posts)Just before/as you hear the whoosh-bang of the impact to the south tower, the smoke and fire in the north tower 'belches' or 'pulses'. (Sound delay due to distance.) Just before the cameraman ducks, because what you don't see when he ducks, is Flight 175's remains bursting through the north wall of the south tower, directly at the cameraman. The cameraman is, based on the angle, I would say hiding behind the north west corner of WTC 5, or a part of the Post Office across the street. Both buildings were impacted by pieces of flight 175, and the south tower, blown out by the explosion of the aircraft impact. Pretty brave cameraman, to keep filming at all given he just had pieces of a building and an aircraft thrown directly at him. One of the landing gear sets, and the starboard engine went right over his head, basically. Large pieces like a section of seats landed on the roof of the post office. Very much in the line of fire.
But the video is critical, because there are two forces that acted on the lobby of each building. There's also separate footage of the WTC1 lobby before WTC2 gets hit. There's broken glass and all sorts of stuff already laying everywhere. The main columns at the center also carry things like air for ventilation. Each floor has baffles to prevent a 'chimney effect' in a fire. But they are only fire baffles. They aren't meant to withstand an explosion. In the rubble it was found that these were blown off in many places, by the impact. So that gives a path that force from the explosion can escape the columns at ground level, blowing out glass, etc. Basically it would be indistinguishable from a bomb going off. That's what any reasonable person would assume it to be. The other force was torque. The buildings resonated with the impacts. Building codes required the towers to withstand 4 million foot-tons of torque for wind loads in a hurricane. (Like Sandy, which hit not far away) The impact of the aircraft on the south tower imparted 7.7 million foot-tons of torque. (we're lucky the towers were so tough, it would not have been unreasonable for the towers to have buckled and fallen over on impact.) Meaning, think of the building as a very long crowbar. The end is embedded in some solid material, like concrete. You put force against the handle, and the crowbar flexes as you load it up. The same thing happened to the building. It flexed. A LOT. This can cause additional damage at the ground level where ceiling tiles, wall décor and whatnot will just break off and fall.
So yeah, the fire fighters at ground level likely experienced something much like a bomb going off. Even the firefighters in the basement and ground level of WTC1, when WTC2 was hit. And my point with this video is that the buildings are linked. And you can see that in the smoke and fire belching out of WTC1 when WTC2 is hit, at 5:58 in the video I linked.
This is because the fire was 'pushed' by pressures inside the buildings. The buildings are linked.
Edit: First time I gave a thought to his position, he is at the North West corner of the Post Office when the South Tower is hit. That's WTC7 to his right. As he was filming, a person was killed about 50 feet away from him as the debris from the second impact came down. That's how close this video was to the base. And he had no way to know what just happened to the south tower even. Imagine the fog of war. Pretty brave to keep filming at all. Should have gotten the Edward R Murrow award for news coverage or something like that. Close enough you can clearly hear the people jumping from WTC1 hitting the ground. I bet he still has nightmares.
What a sad fucking day.