The Truss Failure Theory is a Diversion

It avoids the glaring deficiencies of the column failure theory, but likewise doesn't begin to explain total collapse.

• Prerequisites didn't exist.
  • Neither tower's fires covered even one entire floor.
  • Eager's zipper scenario is impossible given the cross-trussing.
• Domino-effect floor failures were not possible.
  • The fall of a floor would easily be absorbed by the floor below.
  • Some floors must have had large I-beams. Otherwise the building's tube-within-a-tube design made no sense.

• Supposed end result doesn't follow.
  • A domino effect collapse of the floor diaphragms would have left the perimeter wall and core standing -- The floors would have slid down the cores like records on a spindle.