I have seen the collapse over and over before in slow motion shortly after it happened. And I watched it fall floor by floor. What was amazing was the way the top floors were tilted just before the collapse, yet it straightened out in the straight down collapse.
It collapsed toward the center better or as good as any controlled demolition I have ever watched before, and I have watched a few.

The aircraft mechanic report at that site was interesting.

The government has known about the ionispheric shell getting thinner for years now and are trying a few things, and they don't know exactly what to do about it. It is going to effect our planet in more ways than you can imagine, that is one reason people are seeing the nothern lights less and less, and they are not as bright or as strong as they once were.
All those solar flares you have been reading about should have produced a strong display of nothern lights (aurora lights) in our atmosphere. You might want to give it some thought. It is not supposed to effect this generation.
I did not get this info from the internet and I didn't dream it up, and I believe the source I got it from because of his position.