Who would be stupid enough to plant explosives in a building like WTC#7 that was structurally very unsafe according to hundreds of experts and had a huge bulge in it , was leaning , had a huge 20 story section missing at the bottom from debris from the initial collapse and had over 40,000 gallons of deisel fuel in the basement as well as a huge transformer that supplied half of Manhattan. Not even desperate illegal aliens would volunteer for such a suicide mission nor was it neccessary because structural damage plus fire were enough to down the buildings .The fact that it had a 20 story section missing shows that WTC 1&2 were not a controlled demolition .
According to the NIST temperatures were over 1800 F and steel loses its structural integrity at less than 1000F.According to engineering prof. Firmage among others ,steel bridge girders are bent to conform to a curved roadway by spot heating at 800 F.Engineers studied videos and did extensive lab tests and concluded that there was no physical or chemical evidence that explosives were used at the WTC.Steel does not have to melt completely to collapse ; it loses its' structural integrity way below T melt.Chief Nigro warned about the collapse of builing 7 hours before it actually collapsed . Was he in on a Conspiracy , one that cost the lives of so many fellow firefighters?
Peter Hayden , among others warned of imminent collapse of #7 diue to the bulge in the side and the damage at the bottom.In #7 the core columns didn't go to the ground , just to the 8th floor where they were supported by a transitional structure so damage to the transitional structure caused core colums to sink pulling outer walls inward