When you have three skyscrapers falling straight down into their own footprints at free fall speed, you have to wonder how they came down so easily. It was said that the burning jet fuel weakened the steel. But jet fuel is made of kerosene. Have you ever seen a kerosene heater melt? If there was even a chance of them melting, you wouldn't be able to get one. Why should I believe that burning jet fuel (kerosene) brought those buildings down so quickly? The lower floors did not resist the pressure from the falling upper floors at all. There needs to be a thorough independent investigation. Something we haven't gotten yet.