Does the Conservation of Momentum have anything to do with physics? Supposedly the top of the north tower above the impact zone could fall on the portion below the impact zone resulting in the total destruction of the building.
After SEVENTEEN YEARS, minus three months, how could the lack of analysis of that supposed collapse taking the Conservation of Momentum into account not be funny since it could not be done without reasonably accurate distribution of mass data? The Wikipedia entry says the towers came down in 25 seconds, and that is because the remains of the core took longer than the commonly mentioned 11 seconds for the material outside the core.