Where are the high carbon steel columns in that building ? Your comparison is apple & oranges . Molten steel & rock that couldn't be extinguished for over a week . That is fire fighters testimonial who were there. Thermite mixed with petrol & caster sugar.? What domestic fight would be carrying that as it's fuel load?
Where was any of that mentioned in the challenge? The challenge only mentioned top-down collapse of a building, which I have clearly shown. So where's my million?
That building has been gutted & internally weakened on all floors bar the top few levels . So your claiming the twin towers with it's steel structured tied together columns. Would have collapse in the same manner ?
You need to look at how the the Towers were held up structurally. There were two key flaws when it came to holding themselves up after the damage they were inflicted with.
First, they were built to maximize internal floor space, so the structural beams holding up the floors were virtually all on the outside of the building and arranged in a step pattern. So only 1/3 of the beam sections were holding up any given floor.
Second the core of the building was thin steel beams encased in drywall, which both planes were able to in some way damage (far more in the first buildings impact).
What caused them to collapse is easily seen and understood after knowing those. The floors that were damaged were burning at over 1,800 degrees f. The floor beams running from the damaged core to the damaged outer supports began to sag. As they sagged they pulled the outer support beams in, compromising the entire building.
Eventually one of the floors gave way and collapsed, bringing not one floor down, but the entire building above that floor down with it on top of the building.
The reason I say Heiwas analysis is wrong is because he lumps the damaged floors in with the undamaged portions of the tower, basically saying why would these structurally sound parts of a building collapse?!