Ok,experiment is a basic element of modern science.In order to scientificaly prove a controlled demolition of WTC 1,2,7 we have to create a theory on the exact method,which was used to bring them down and than test it with (repetebale) experiment.

I (with large influence from achimspok's work) did a theory on the precollapse weakening and initiation of the (Twin Towers collapses).I've described it in my previous posts,but a little bit of recapitulation isn't gonna to do any damage.

core column

So what caused the precollapse bowing of the exterior walls of WTC 1 and 2?Most probably thermite charges which were placed mainly at the 104th,105th and 106th floor.This charges attacked mainly the 1000 and 900 row core columns.(I'm not claiming that this was all,maybe there were other attacked points of the structure,but I'm absolutely sure only about these points)

Wanna prove?