Column Failure Would Not Level the Towers

• All 287 columns would have to have weakened to the point of collapse at the same instant to cause the telescoping seen in North Tower.
  Asymmetric damage cannot produce such a symmetric result.
• Even if simultaneous column failure caused the building to start crushing itself straight down, it would either stop, or be deflected to the side and topple.
• Of collapse causes other than controlled demolition, only earthquakes can cause the simultaneous damage needed to cause total collapse.