Something i dont get about 9/11 wtc collapse.
Of course a plane impacted, but the whole building shouldnt have crumbled like it did due to a plane. The floors obviously pancaked, but why did the core collapse also? The core was the strongest part of the building, it should have remained standing, or at least part if it.
And i doubt that the core was all that seriously damaged, since the impact of the plane to the side of the building caused the most damage, inside was basically a spray of debris, since the plane is made of alluminuim, not steel. Not to mention most of the planes fuel was burned up on impact.
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