Un B767 (145 tonnellate) to 255 m / sec (920 kmh/3600sec) has an energy of about 470 million .* Kgm
None of the towers fell on a glass table, although the tower would absorb the kinetic energy of a Slepp lateral 470,000,000 kgm.
least a glass on the ground should be dropped.
But no!
NO GLASS!
* from wikipedia:. The kinetic energy is then associated with the mass and velocity of a moving body. The kinetic energy of a particle can be expressed mathematically by the semi-product of its mass by the square of the modulus of its velocity.
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