Many institutes such as the National Institute of Standards and Technology and the Popular Mechanics Magazine have carried out investigations dismissing the 9/11 conspiracy theories as inadequate. The civil engineering community has accepted that a fire caused the Twin towers to collapse, not controlled demolition. Around 10,000 gallons of jet fuel was dispersed throughout the tower creating a temperature of 1,000 degrees Celsius. According to senior engineer Farid Alfawak-hiri, “Steel loses about 50 percent of its strength at 1100 degrees Fahrenheit”(qtd. in “Debunking the 9/11 Conspiracy Theories”). (1,000 degrees Fahrenheit is equal to about 500 degrees celsius.) According to Williams, "The jet fuel was the ignition source, it burned for maybe 10 minutes, and [the towers] were still standing in 10 minutes. It was the rest of the stuff (rugs, paper, furniture) burning afterward that was responsible for the heat transfer that eventually brought them down" (qtd. in “Debunking the 9/11 Conspiracy Theories”). The high temperature made the floors sag and the perimeter columns bend, causing the sounds of explosions. If the towers were demolished then the collapse would have started from the bottom. Footage shows the towers collapsing from the
Many institutes such as the National Institute of Standards and Technology and the Popular Mechanics Magazine have carried out investigations dismissing the 9/11 conspiracy theories as inadequate. The civil engineering community has accepted that a fire caused the Twin towers to collapse, not controlled demolition. Around 10,000 gallons of jet fuel was dispersed throughout the tower creating a temperature of 1,000 degrees Celsius. According to senior engineer Farid Alfawak-hiri, “Steel loses about 50 percent of its strength at 1100 degrees Fahrenheit”(qtd. in “Debunking the 9/11 Conspiracy Theories”). (1,000 degrees Fahrenheit is equal to about 500 degrees celsius.) According to Williams, "The jet fuel was the ignition source, it burned for maybe 10 minutes, and [the towers] were still standing in 10 minutes. It was the rest of the stuff (rugs, paper, furniture) burning afterward that was responsible for the heat transfer that eventually brought them down" (qtd. in “Debunking the 9/11 Conspiracy Theories”). The high temperature made the floors sag and the perimeter columns bend, causing the sounds of explosions. If the towers were demolished then the collapse would have started from the bottom. Footage shows the towers collapsing from the