BBC Documentary. I have seen other videos and read other articles that address this topic. I think this one is a good summary of the building design, materials, and forces that all contributed to the collapse of the towers.
I hesitated to post this because of the numerous conspiracy theories about a government controlled demolition, a cabal by the Jews etc. This NOT A FORUM to discuss conspiracy theories! I will make one comment here about controlled demolition. If you watch the collapse of the towers, you can easily see that the collapse is from the top down, each floor collapsing the one below it. A controlled demolition is done from the bottom up, or multiple points, and the explosions before collapse are clearly visible and audible.
Believe me, I have heard every conspiracy theory over the past 22 years about the twin towers, and Tower Seven. They have been addressed.
Don’t comment unless you have first watched the entire documentary, and then directly address the points made in this video by the building structural engineers, fire experts etc.
Stella's Place 
My brother lived in Manhattan. While he was watching the towers burning, before the collapse, his friend, an architect, said the towers would pancake down because of the construction.
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I can’t begin to fathom how the engineer could withstand the rationalization of what transpired those decades ago. They dealt with what was available then (707 aircraft) but technology never stands still. Seems like it’s a race to see who can do it better, faster, higher, or more economical; when Father time is involved, change is the only thing consistent! Things like this gives one pause to reflect, no? I see it as a time to ask for divine help in our existence! TPTB seem to want to take the Creator out of this equation? Kinda makes one feel like a grain of sand on an endless beach! Thank you Stella for this video. Info I did not know!
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