The mystery surrounding the third tower known as Tower Seven (WTC7) has been central to many conspiracy theory’s because the skyscraper fell to the ground without being hit by a plane.
The 47-storey third tower, located 110 meters (350 feet) away from the World Trade Centre, collapsed seven hours after the twin towers.
Following an extensive four-year study at the University of Alaska, using four extremely complex computer models, Dr. Leroy Hulsey, Dr. Zhili Quan, and Professor Feng Xiao found the “fire did not cause the collapse”.
In their report, it says: “The principal conclusion of our study is that fire did not cause the collapse of WTC 7 on 9/11, contrary to the conclusions of NIST [National Institute of Standards and Technology] and private engineering firms that studied the collapse.
“The secondary conclusion of our study is that the collapse of WTC 7 was a global failure involving the near-simultaneous failure of every column in the building.”
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