When each jet cut its way into a building, it took with it parts of walls and ceilings, Simensen said. Steel bars in those walls would have gashed its fuel tanks, which would have caught fire.
With the plane positioned somewhere in the middle of the building, blanketed in debris and with no route for heat to escape, the temperature would have rapidly escalated, reaching 1,220 degrees Fahrenheit, the melting point of aluminum — of which there was 30 tons in each plane fuselage — within an hour. The molten aluminum would then have heated up further to between 1,470 and 1,560 F.
“Then molten aluminum becomes [as liquid as] water and has so much heat that it will flow through cracks in the floor and down to the next floor,” Simensen explained in an email. There was an automatic sprinkler system installed in each ceiling, and it was filled with water.
“When huge amount of molten aluminum gets in contact with water, a fierce exothermic reaction will take place, enormous amount of hydrogen is formed and the temperature is locally raised to 1,200 to 1,500 C,” or 2,200 to 2,700 F.
Chaos rapidly ensues: “A series of explosions will take place and a whole floor will be blown to pieces,” he wrote. “Then the top part of the building will fall on the bottom part, and the tower will collapse within seconds.” This is what Simensen believes happened in the two World Trade Center towers.
Read the article. Alcoa researchers introduced 30 kilograms of molten aluminum to 20 liters of water. The resulting explosion created a 30-meter diameter crater.There is no need to speculate about 9/11 being an inside job. Science explains how the buildings collapsed.