Here's my take on it.
I think the buildings were rigged with explosives many weeks to a few months in hand. Just before the explosives were being placed starting from the top down, I think companies already in those buildings were basically told to ship out well in advance. I think the buildings were then stripped of all furniture, carpets, basically everything that was re-usable, then Thermite cutter charges placed in strategic places through out the building to achieve a pancake collapse, which could not happen without explosives anyway.
How did they achieve this without being seen or people being suspicious?
Fairly easy, by using the freight elevators, so trucks are going in, under the building and all the necessary explosives took in and all the furniture took out.
I would imagine there's many people in that area that are still asking questions today about seeing strange movements about that complex but who's going to make any sense of it all before anything has happened, when you consider it's just normal every day movements that they see anyway, at the time.
How can all of this be achieved without involving too many people?
Well, you have to segregate it all, for instance, removal companies will be employed to remove office items and strip the floor under the assumptions of either re possession or simply floor clearance for a new company or revamp, so they maybe are doing an innocent job but now, I'll bet most if not all of them are thinking, " what the hell...we cleared so many floors, I wonder if it was being rigged for demo" and another company's removal men could be thinking the same.
So basically, compartmentalisation is the key in all this. You get 5/10/20 removal companies to innocently clear the building and they just do their job.
They can put two and two together after the event but who's going to listen? do they want to speak out about it, or even, dare they speak out about it, or maybe some have and have been told to button their lips or never work again or worse. I don't know the answer to this, I'm just piecing it all together.
Ok, so there's the building cleared and now the charges are put in place, this time by people that do know what's about to happen, as in, they are paid to rig and blow up the buildings ready for a new complex to be built and anyone who mentions it, will face the consequences, so up to now, nobody knows what the whole plot involves other than what they are told at the time and will have to put two and two together later...but think about this.
Imagine you were a demo expert and you were given that job on the understanding that you get paid handsomely as long as you don't open your mouth, letting on about the demo to anyone, so you agree, as it's your job, the pays excellent and so what, to you , you're just downing some big skyscrapers and clearing a complex for rebuilding of up to date ones.
Many people can be asleep but people are not stupid and can see that there is a lot wrong with this. The problem is, dis info is always put into it as well to get people arguing against each other so most people don't know whether they are batting or bowling.
These set ups might appear amateurish in their making but they are well thought out in advance and contingency plans are always in place to shut those up who are awake to what's going on, that's why you get TV programs made about conspiracy theories and the reason they do this, is to pretend to go along with the conspiracy , yet they totally twist it away from what really happened to what some people think happened and then create the debunking version to really screw you up.
To see past all that, you have to see past the manipulation of the media side steps of issues to ones which they promote, for example, the media will come out with, " conspiracy theorists may have a point in this terrorist attack being known about because they cite NORAD's inability to respond as a proof that they knew what was about to happen."
You see how that throws people off what really happened?
You see, this gives the full mindset to planes being really hijacked and NORAD let it happen, so your mind cannot comprehend the building being controlled demolition, as planes obviously did it and you know this happened because you saw those planes hit the building didn't you? On TV.
On TV.
Let me explain something to you.
Hollow Aluminium planes, do not melt into buildings like that, with nose, fuselage, wing tips, tail fins, in fact, everything pieces of it melting into a steel framed skyscraper as well as through floors and leaving a cartoon hole of it's shape in the building.