This article describes the structure of the World Trade Center Twin Towers and what happens when the release of potential energy, due to downward movement of the mass above one of its supporting columns when buckling, exceeds the strain energy that can be absorbed by the same column below. The conclusion is that no global collapse of the Towers can ensue under the given circumstances. …
Go to Part 2 it is more interesting than Part 1 with videos that clearly show what happens before downward motion starts, etc.
Comments by the author, Anders Björkman; N.Y.C. Fire battalion fire chief, Arthur Scheuerman; Joel Skousen; and myself follow.
Top architect explains why 9/11 buildings were brought down by controlled demolition and Al Qaeda didn’t have the technology or access to do it. Who did? Two months before the ELEVATOR MODERNIZATION PROJECT, Nick ROCKEFELLER predicted a 9/11-like event to trigger war!