Some Proofs of Demolition

1. The towers' concrete was pulverized in the air.
2. The steel superstructures of the towers provided no more resistance to the falling rubble than air.
3. The expansion rate of the dust clouds produced by the collapses indicates heat energy far in excess of gravitational energy.
4. The South Tower's top shattered before falling into intact structure.

Proofs 1 and 2 require only common sense. Proof 3 uses basic thermodynamics, and Proof 4 uses basic mechanics.