i think that its just another one of those things that don't have to be explained just ignored. and when brought by genuine truth seekers, they get called nut jobs by people who refuse to believe that anyone on tv would ever lie to them...
I guess if you ignore the fact that wtc7 did collapse, like the 911 commission did then it just goes away.

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"It is not necessary to change. Survival is not mandatory."
-W. Edwards Deming