Creative Speculation

what a fireman sees in one tiny pocket at the very edge of the fire says nothing about the fire on the floors above.

Three questions to ponder:

1. Which direction do fire in high rises spread?
2. If the fires were so weak, why did so few survive from the floors above the impact zone? What stopped them from simply walking down to safety?
3. If you see massive smoke plume on the horizon sending thick clouds of smoke miles into the sky, do you think "pretty weak fire there."? Those smoke plumes were large enough to see from space.

Take a close look at Madrid again. It remained upright only because it had a concrete core. The steel portions of the building did collapse.