jaydeehess
Penultimate Amazing
The shock wave from the collapse of the east penthouse, from a failure high in the building, was not moving through one solid piece of steel, but a composite structure. So I would not consider the velocity of it abnormal.
There is no chance the east side interior had collapsed low in the building to cause the east penthouse fall without white dust emanating out of windows. That is not happening prior to the east penthouse fall or immediately after. It is only broken windows about 15 stories down with no white dust. This was due to a shock wave originating from above.
You might not realize it but a shock pulse also causes a ring in what it strikes, which can be observed much more than the actual shock wave.
From which windows? As observed in which videos?
If floor 13 failed, one might expect some visible expulsion of smoke/dust at the 12th floor. Its not necessary though.
As column 79 buckled floors attached to it would fail proximate to the column. Air being pushed by floors failing will be moving down. There is already a hole below any failing floor so air will continue to move down. At this point its a small area of floor that is failing.
In the towers whole sections of floor pans were coming down and yet only a few "squibs" were seen.
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