Neither building showed an incipient failure at the point of penetration before the nearly perfect cascade occurred
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That is incorrect. The very first moment of movement was in the gaping hole where the aircraft gouged out a hole in the building.
In that place, any demolition devices would (a) be destroyed (b) if not destroyed would be prematurely detonated out of sequence by the fire (c) any controller electronics would be melted.
So the very place where there COULD NOT be any demolition devices in operation IS the place where the building starts to move. THe gaping hole begins to close like a mouth closing, windows start popping out as the walls warp, and you can see the columns buckling.
The Building DID show incipient failure at the point of penetration.
Several minutes before the collapse, the NYC police started to claer the area because they could see that the building was “leaning” or “buckling”
SEE:
Furthermore, note the most conspicuous aspect of the observed collapse.... NOTHING MOVES in the building until hit from above.
If there were controlled demolition, this would be impossible to achieve. NO demolition occurred (if any) until a SPLIT SECOND before the mass falling from above stricks.
This split-second accuracy (a) would be impossible to achieve, (b) would require 22,050 demolition devices in EACH of the towers.... (268 steel columns around the perimeter + 47 interior columns) x 70 floors at least.
To cause each floor to move only a split second before being hit, EVERY floor would have to be wired.
To create the supposed smooth and rapid collapse, ALL the supports would have to be wired with explosives.
Note that we DO NOT see a CHUNK of floors below the falling mass moving. We see NOTHING moving until the mass falling from above strikes.
You describe the exact objective of a controlled collapse of a building, and then say that it is impossible to achieve, and then say that it is what happened. Wow!
After watching the videos over a hundred times looking for an indication of failure at the collision site, and it just isn't there, you will never be able to tell me that it was. And if it had failed there, the lower portion would have collapsed first, rather than as in a controlled demo where it begins on the top floor, and quickly cascades downward.
You have destroyed your own argument.
PS:
Where is the greatest moment, the top or the bottom?
At the ground level, obviously. Yet initially the greatest destruction was just a few floors below the top.
Draw us a diagram of what could cause that.
Osama knew damn well that just the planes wouldn’t do it, but he also knew what would: a shift of mass above the damage, that would turn the upper portion of the building into a giant lever acting on the weakness.