You think those supports on the walls that were steel stock sticking through the walls and holding up the floor trusses in sheer, were sheared off, don't you? I saw that red circle in your first post, pretending there's something weak about steel bar in sheer with a steel wall; in reality, what you are saying is the steel bar was cut through by what exactly? falling debris? And where did the debris come from? You need explosives to make those cuts, it isn't so easy to shear steel bar. All you have done is returned to the pancake theory except now instead of pancaking resulting in pancaking, it results in demolition; because that's what reduces a steel structure to a bazillion pieces of debris; demolition does that... not pancaking. At any rate, a vertical truss doesn't pancake. And the WTC was built with the highest grade steel known to construction, so it didn't melt from office fires, and the four inch thick steel that was pile driven 80 feet into bedrock never had contact with the office fires, yet that steel was reduced to molten pools of liquid metal, even though it was nine floors below street level (over 100 feet below ground). Obviously they cut the footers with thermitic devices; and they did a thorough job, WTC had a lot of footers and every single one was cut and melted. Demolition always cuts the footers, but they are a tad out of reach of normal office fires. WTC had all the results of demolition; the towers were blown to bits, not just collapsed, the footers were all cut, explosives throughout the structure performed the softening up job prior to pulling the building, and the towers fell at free fall acceleration. This top post was just pointing out that the NIST analysis called for an intact upper floors (tops) to perform both shearing of the walls and pulverization of the core; and that never existed. Again, the core ran from ground level to rooftop, it was seamless, and it was enormously thick, enormously strong, how exactly could it be pulverized by falling debris? Objects falling down do not fall sideways, the most you could hope for would be friction from sliding against the core, there is no shearing from falling debris. How exactly was the first shear performed? The cores were snapped in half BEFORE the towers collapsed; what sheared the cores and kicked the tops out at angles? That's exactly what shape charges on the side of the core would do. Without demolition, how could you possibly snap the core in half and kick the whole top out at an angle at the ONSET of the collapse sequence? (maybe a giant angel swung his sword at WTC?) I don't think God had it in for the towers, which leaves exactly one other possible cause of destruction; explosives. When a building or structure is thoroughly demolished, chances are pretty good that the demolition was probably caused by explosives carefully placed, logistically engineered and timed by experts in the field of demolition.