The reality is, prior to 9/11 truth movement, there was nothing wrong with the concept of a building collapsing after being hit by a 200,000lb wide body airliner at 500mph. Anyone with half a brain knows that if an aircraft of this size hits a building, it's going to collapse. The reality of it is that if 9/11 was to be an inside job, and the target of this false flag attack was the trade centers, all that is required is an aircraft in each. No bombs, no thermite, no sneaking around, no massively complex, lengthy, high risk (of being seen/caught), no having to worry about the hundreds of people needed to prime the building with explosives whistle blowing 10 years down the track, no worrying about explosive residue in the rubble, nothing. All that you need to do is fly an aircraft into it. That's all.