Considering the way both building went down, I believe it was an inside job. Those buildings were felled by professionals. Both went down perfectly, in imitation of YouTube videos I've seen of professional demolitions. Planes didn't do that.
Just a thought.....If a building constructed like the WTC were to undergo actual structural failure and then collapse, how would that have looked? How would it have differed? What are your expectations about how a naturally collapsing steel skyscraper would behave? This is reminiscent of a famous question posed by the philosopher Wittgenstein:
Wittgenstein: Tell me, why does it seem more natural for people to believe that the sun goes around the earth, than the other way around? Student: Well, obviously because it looks that way. Wittgenstein: I see. And how would it look like, if the earth went around the sun? Student: Well I suppose..... (smiles) Yes. I see what you mean.
I ask that question because professional demolitions are designed to induce gravity-driven progressive collapse; the explosives do not blow up the building but set a collapse into motion. So of course they will look similar. Rather, what are the differences? Well I can certainly think of one huge huge relevant difference: the WTC collapses did not involve the detonation of explosive charges. No bright flashes, no loud BANGS, much less a timed sequence of explosives. This is very conspicuous too in the case of the WTC7 collapse. Where it counts, there is no substantive similarity between the collapses and actual building implosions -- only the superficial similarity of what happens in general when tall buildings succumb to the forces of gravity.
Also the buildings did not 'go down perfectly' in a manner similar to professional demolitions. They fell in a rather chaotic uncontrolled manner, and instead of failing simultaneously throughout the entire structure (as in the typical BANG BANG BANG controlled demolition), the Twin Towers each failed at their weakest floors (the impact floors), with floors below failing individually in face of a falling upper block. This is very different from what normally occurs in controlled demolitions. The collapse was also preceded for many minutes by conspicious deformation of the perimeter columns where collapse began (the south face in the case of WTC1 and the east face in the case of WTC2), showing that failure was already in progress for some time prior to the collapse, and the video of the WTC2 collapse shows quite clearly that this increasing deformation led directly to the initiation of the collapse (basically, the columns were pulled inward further and further until they snapped). This is not what occurs in controlled demolitions. The floors also collapsed around the core, which took longer to fall; videos show remnants of the core of both towers standing haphazardly for some time after the collapse of the floors. Not exactly a picture "perfect" collapse. Nor did they fall perfectly into their footprint but spread debris over a large area and onto other surrounding buildings.
It is also worth pointing out that all three buildings were much taller than the largest building ever imploded (which was 33 floors in height). So on a SINGLE day, some mysterious demolition company set the world record for controlled demolition THREE TIMES. That must've taken massive preparations, which oddly enough no one ever noticed. Imagine rigging up the three buildings for explosive demolition while they were fully occupied, and since most of the columns were on the exterior of the buildings, that would have meant going into people's offices and drilling holes into columns and inserting explosives right behind people's desks and cubicles. I find that really hard to believe. And what demolition company was it that did the job? There aren't very many of them. What evidence is there that they were there in NYC in advance of 9/11 working hard on preparing those buildings for demolition? How did they keep it all a secret? And how did the perps convince such a company to ignore the laws in New York City which have banned the practice of explosive demolition for many years in Manhattan?
