I read years ago that the security and maintenance firms were completely changed out for the whole plaza about a month before the event. I wish I could remember the source but it described in detail the absolute credibility of them being able to wire these buildings for detonation weeks before the event. Again, the biggest smoking gun of 9/11 that most don’t discuss or even know about is the amount of fine thermite dust that covered everything in the area. Thermite is used in demolition and is the only plausible reason how those buildings came down. They said it was the highest grade thermite they had ever studied.