n0spam4me
VIP Member
the north face descended essentially in free fall, indicating negligible support from the structure below.
This was quoted from the OP and needs to be addressed, free-fall acceleration requires that there be NO resistance, not "negligible" resistance from structural members that are bending, buckling, needing to be pushed by the falling mass, the falling mass is doing NOTHING except falling. This is the critical bit, it is NOT imperative to know what sort of cutting devices or explosives were used to create this effect, it is clear enough that the effect had to have been the product of an engineered demolition.