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Collapse of WTC7

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Uploaded by on Sep 12, 2007

East penthouse of 7 World Trade Center collapses then collapse of the entire structure, taking at least 13 seconds - contrary to other video clips that only show 7 seconds of the WTC7 collapse. Video clip is from CBS News with some annotation added.

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  • How could this possibly happen without some catalyst to initiate the fall - 13 seconds is still rather fast for such a huge building. The third steel framed building in the history of the world ever to collapse due to fire? If you are trying to disprove the CD theory you did a bad job, if anything you aided in its proving.

  • "Why didn't it come down imediately after the damage?" You answered yourself: because you need more than just one support column to fail. There's also the fact of structural damage. I've known buildings who had to be evacuated because a simple crack got bigger and bigger. The building could take months or even years to show, but at a certain point, you'd get to danger of collapse. And that's inner structural damage, only. Having half a skycraper fall on another building quite hurts it.

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  • fire, most stupid answer ever

  • @jfarris4417 due to fire? Wrong! Structural damage and fire.

  • @SMITEM1 no video shows what you are saying, it was 7 hours after WTC 1 and 2 collapsed.... then came down WTC7 in an almost perfect demo... text book in fact..

  • @jfarris4417 Building are made to stand some damage in case of receiving an impact. So you can evacuate people from them. The towers stood a good bit too. And I doubt having a good part of a huge skycraper falling into a building computes as "exterior damage". Half a burning tower fell on WTC7. That's enough to harm the building enough for its collapse. And tall buildings are designed so they fall over themselves, so they don't hit the nearby ones.

  • It fell because it got severely damaged from the buildings collapsing on top of it! Just think! 900,000 pounds of steel falling at speeds over 200 miles per hour which is equivalent to 180,000,000 pounds of force!!! Which weakened the WTC7 building, which led to its collapse. People, use your brains, its in you friggin skull for a reason!

  • The video of building 7 every "twoofer" hates to watch...It simply destroys their little fantasy. It's much like a 6 year old child catching his parents putting out Christmas presents and realizing that Santa doesn't exist. Believe what you want "twoofers", I know you will find something else to deny the mountains of evidence so you can keep your fantasy alive. I've given up arguing with "twoofers" so don't expect a reply if you decide to reply to this statement. Seek the truth twoofs.

  • @givebeesachance The building is one structure, you need more than just one support column to fail. If you can take out one or a few support columns and bring down a building demo experts would just wire up a few columns and save money on explosives. You must take out many support columns, on multible floors simultaneously to bring down a building. Why didn't it come down immediately after the damage? Damage was not bad, buildings closer than 7 had to be blown later because they din't collapse

  • @jfarris4417

    50 story buildings do not "topple" like they are made out of legos. Even a slight uncentering causes unbearable strain on the support structures and in a 250 million killogram building, when one structure goes, they all go, and they go straight down.

    And when they fall, nothing stops them. The contents of the building are pulverized by thousands of tonnes of concrete and steel. This isn't Tetris, where one level supports the next.

  • this link will be the answer....

    watch?v=nH5-DpMObGc

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