My experience of controlled demolition pretty much consists of watching the discovery channel... That being said... On all of the shows that I have watched on the subject it takes these demolition experts weeks and sometimes months to strip walls and columns of sheathing in order to expose steel and plant charges. They also drill holes in concrete columns and walls in order to plant charges in them. The charges are then set off in a calculated sequence in order to get the controlled demolition.

I want to know how the perpetrators were able to do this without being noticed in the first place? Also, how were the explosives, wires, and detonators able to remain stable amidst a raging inferno until they were set off?

I just dont buy it...