This is visually very detailed in this analysis 6. Regarding the World Trade Center 7, the furthest one can go is to consider the eastern penthouse which collapses early as something that falls “right down through the building’s resistance”, since the penthouse is clearly seen falling down through the building itself, partly because it disappears and partly because windows can be seen to be broken on the north side in a straight line down through the building where the penthouse seems to be falling. It is difficult to get the last part of the claim, “…right down through the building’s resistance” to fit with the World Trade Center 7, since the collapse here does not look like the collapses of the World Trade Center 1 and 2 where the top parts of the buildings plow through the underlying floors. The collapse was not in freefall, it was not symmetrical, and the building debris spread over the nearby streets 5. Prior to the 13.5 seconds, there are an additional 3 seconds or thereabout where no movement of the building is detectable but where smoke and dust are pressed out of the bottom of the building, indicating that the building has already started to collapse from the inside 4. The visible part of the collapse takes about 13.5 seconds before the area is covered in smoke and dust. Gravity does pull the building straight down (what else should gravity do?) but towards the end of the visible collapse, it can be observed that the building topples and falls apart. During the collapse, a part of the building collapse in freefall for 2.25 seconds, which – for that part – is equivalent to 32 meters. The building is 186 meters tall and takes at least 13.5 seconds to collapse, which combined is way from freefall. One can reasonably apply the same conclusion to the World Trade Center 1 and 2, namely that it would be quite implausible, especially since every boom would be about 130 dB which would have been heard over lower Manhattan. Neither NIST, FEMA, or other recognized experts have investigated if there could have been explosives in the World Trade Center 1 and 2, but NIST has done this in their investigation of the World Trade Center 7 3. All three are very clear signs at real controlled demolitions. There are none of the most obvious signs of controlled demolitions with regards to the World Trade Center 1 and 2: No rhythmical booms from explosions, no flashes from explosions, and no clouds from explosions either. The floors were not designed to be able to withstand such force 2. Even if the floors themselves were only a few meters high, the energy released is enormous when the many tons from the upper part of the buildings fall just a few meters. It does not take more than the collapse of one floor, before there is enough energy and mass above to break through all the floors below. The part of the buildings that are below the impacts of the planes does not have a combined own resistance that can withstand a collapse from above. A detailed explanation of the progress of the collapses can be found in NIST’s reports 1. None of the collapses happen in freefall, which is most clearly observed by elements from the building’s facade, breaking off during the collapse, falling quicker (in freefall) than the collapse itself which lasts considerably longer. The top is pulled down exclusively by gravity which is why the top falls down through the building itself. The collapses start clearly asymmetrical, by floors on the side where the planes hit breaking down, whereafter the rest of the floors also break down. The World Trade Center 1 and 2 both start their collapses precisely in the area where the planes hit and the sides where the planes caused the greatest damage and where the fires were likewise the most fierce. Since each building collapsed completely, it must mean that they were all destroyed by controlled demolition. The claim suggests that freefall speed and symmetry should be signs of controlled demolition, as well as the buildings should have been able to withstand the collapse of some floors due to fire. It is unclear if the claim is about the World Trade Center 1, 2 or 7 but in this article, it will be treated as if it covers all three buildings. Collapse at near-freefall speed, symmetrical, right down through the building’s resistance 0
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