9-11/anomalies/WTC7

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Overview

Of all the anomalies surrounding the 9/11 attacks the collapse of WTC7 is perhaps the oddest. Not having been struck by any major pieces of debris, and not appearing to have any major fires in progress, it suddenly collapsed many hours after the second tower-airplane collision, exhibiting many characteristics which at least one expert has identified as those of a controlled demolition.

This is especially odd in that the building was the site of a city emergency control center (moved there in 1998) and thus was believed to be especially rugged: "Administration officials [...] said it could survive some bombs, would be impenetrable to gunfire and have a closed air circulation system to prevent the influx of gas. Its telecommunications equipment, they said, could operate even after a nuclear blast." [1]

Main Anomalous Details of Collapse

not hit by any major debris
no major structural damage
no major fires
delay of many hours between impact and collapse
clean, vertical collapse
collapsed from the bottom
middle began first, then outer edges (very close timing)
collapsed into its own footprint

Incidental Anomaly

Just how did the BBC get the idea that WTC7 had collapsed many minutes before it suddenly did so? Why hasn't there been any kind of investigation to clear up what is most likely an innocent mistake made on a day of unprecedented chaos?

Sources

interview with Controlled Demo Expert Danny Jowenko giving his firm opinion that WTC7 was brought down on purpose
a related article includes links to about a dozen YouTube clips of WTC7 coming down (haven't actually looked at these yet, but certainly video clips I have seen confirm that the collapse was from the bottom and that the center started sagging fractions of a second before the whole building went smoothly down)

Links

Collapse Analysis

Pre-Attack

1998-06-14 Mayor Defends Plan to Build Crisis Center