Oz, I happen to be quite well versed on demolitions, having done breaching and render safe charges in combat, attended various classes on the subject, etc. now, I'm not going to misrepresent myself, I don't know every explosive out there, and I don't know all the commercial charges and methods, but I do understand the laws of physics, and I can tell you that regardless of how nano the thermite is (which is an enduring burner not a shear force inducing blaster), you'd need a shit ton of it to take down a building the size of the WTC. A shit ton of demo can't just be casually brought in and left next to a wall without somebody saying what the hell is this. Further to cut the steel and rig the primers to blow in the sequence that the videos show, there would be holes cut in the sheet rock to expose the structural columns and ceiling panels to run the shock tubing through. This is not something that could be done covertly, it just isn't. Further the complex initiation sequence necessary to push the charge up 110 stories (1360') would end up having to be laid out over the entire lobby. It would take a few hours to wire it all up. This would not go unnoticed.
That said, thanks for playing try again.
