I didn't see an example of one myself, I had direct reports of those who witnessed it and the aftermath in an industrial accident nearly 35 years ago. The current flow would be so high, the temperature rise so rapid, that substantial steel could vaporize literally in seconds. Again, people who do not know anything about the technologies involved have wildly speculated trying to make facts fit their fancy. BTW, it is not clear to me that in a controlled explosion detonation to destroy a building, such high temperatures would be achieved. The damage is invariably due to shock waves, not heat. I don't know where you got the information about the vaporized steel from but I would be surprised if the possiblity of electrical failure had not been raised and investigated. Comment number 86. A look at the blueprints for the core of WTC 1, available through the download page of Architects and Engineers for 9/11 truth, shows at a quick count 27 of the 47 core columns were open to elevator shafts. Placing devices on these columns could have been done privately and with little disruption to enclosures around the columns. I think it is plain that there was OPPORTUNITY for, say, a military team to access the core columns relatively easily, and to place devices powerful enough to disrupt couplings and joints. Given the documented damage in the first 5 to 8 minutes after the plane strike, and the eyewitness accounts of occupants, firefighters referring to secondary