It is a day of infamy 9/11. The official investigation concluded that intense heat from the crash and the jet fuel melted the support beams causing the [WTC] towers to collapse. But architect Richard Gage doesn't believe that. He is the founder of Architects and Engineers for 9/11 Truth. [Gage:] There is evidence to suggest that explosive demolitions have brought down all three World Trade Center skyscrapers. We have now 1,500 architects and engineers calling for a new investigation based on this evidence, including the third skyscraper that most people know nothing about. This is a 47-story skyscraper that collapses at free fall acceleration, straight down ... into its own footprint just like a controlled demolition. This is extraordinary evidence, along with the chemical evidence of high-tech nanothermite composite explosives or incendiaries found in the all the World Trade Center dust. The architects and engineers are highlighting the specific evidence in these three skyscrapers, because its so clear that they're explosive demolitions. We have [found] in all of this massive quantity of dust ... iron microspheres the size of the diameter of a human hair. Billions of them ... are found. These contain the evidence of ignited thermite. There is no other explanation for them. What the 1,500 architects and engineers that I represent are calling for is an investigation that is thorough that uses the scientific method [and] analyzes all of the evidence. Once this evidence is all analyzed, we'll let the chips fall where they may. We don't have conspiracy theories. What we want is a real investigation.