http://deseretnews.com/dn/view/0,1249,635198488,00.html Extremely hot fires caused structures to fail, BYU expert says By Suzanne Dean For the Deseret Morning News EPHRAIM — A Brigham Young University physicist said he now believes an incendiary substance called thermite, bolstered by sulfur, was used to generate exceptionally hot fires at the World Trade Center on 9/11, causing the structural … Continue reading Physicist Says Heat Substance Felled WTC