what point on the building?
the environment and stresses are different for the 2nd floor as compared to the 104th floor
The force of gravitational acceleration is the same on every piece of the building regardless of which floor it is on, what altitude it is at, what stress the material is under, or the composition of the material.
not every floor fell "through" the one below it
it will fall at a rate lower (smaller, lesser?) than free fall, but not by much
I think some real world problem solving might help drive the physics of this home. If you had to drop from a hundred stories, would you rather fall ten feet one hundred times, or a thousand feet all at once? Which fall (or falls) would leave you less likely to have broken legs (or die) at the end?
https://docs.google.com/viewer?url=http://www.greenharbor.com/fffolder/speedtime.pdf
One hundred falls of a bit under a second each, of a total time of roughly 100 seconds?
Or one single fall of one thousand feet, of a total time of roughly 10 seconds?
Each time a fall gets broken by an object it is going to add more time to the fall. If the fall is "broken" by something insubstantial like a sheet paper or pigeon the difference will be inconsequential, but in the "official 911 story" the fall is broken by a solid structure designed to be load bearing.
With this in mind, dig up one of those several videos that were recorded of the collapse of those towers. When falling in the video, how long does it take to visually see the tower collapse down to the ground? It's falling at the same speed as if you dropped a rock through air in free fall. And the video shows debris blasting out floors below where it collapses before the collapse arrives. Not "melting" but debris blasting... like the way you would detonate the supports on a building in demolition, to bring the floors crashing down from the top at free-fall speed.
It's not my country and I have no interest in arguing with people here about this, but I will suggest that a little bit of discernment might be used before endorsing a crusade to place targeted ethnic groups in concentration camps. Perhaps a documentary like "Loose Change" might be beneficial (listen to both sides of an issue before making up one's mind.) The USA might not be the holy city on a hill that it's made out to be but that shouldn't matter. Our citizenship is in heaven regardless of what government or regime rules in the here and now.