WTC 7 Collapsed at the Same Speed as Known Controlled Demolitions

Here is a video of the demolition of the Landmark Tower, Fort Worth, Texas:

The Landmark Tower was 380 feet high.

According to the timer on Youtube, it took about 7 seconds from the start of the collapse (once the building started to fall) until the last of the building reached the ground.

Or check it yourself: here is an online stopwatch (click the green arrow on the left).

WTC 7 was 576 feet high (counting the rooftop penthouses, it was 610 feet; but since the penthouses collapsed a couple of seconds before the main building, and was thus part of a different and discrete process from the collapse of the main building, and - most importantly - because the collapse of the penthouse is irrelevant to the question of whether the main building itself fell as fast as known demolitions, we will ignore the penthouses for now).

WTC 7 collapsed in approximately 7 seconds, not counting the earlier collapse of the penthouses. See this video, and other videos here.

So how did a 576-foot building collapse in the same time as a 380-foot building? Even using controlled demo, that would be an impressive feat.

But let's bend over backwards to be reasonable. Let's add 3 seconds to WTC 7's apparent collapse time - let's call it 10 seconds - to be make sure we are not underestimating how long it took building 7 to collapse.

How did a 576-foot building collapse in 10 seconds when a 380-foot building took 7 seconds?
Acceleration would not have caused the additional 196 feet of Building 7 to disappear in the last 3 seconds.

Bottom line: WTC 7 collapsed at the same speed as known controlled demolitions.

I encourage researchers to compare the collapse times of other demolitions, and then let me know what you find. Other videos of known controlled demolitions can be found here, here and here.

Credit for this approach goes to Dr. Steve Jones.

By way of background, I asked Dr. Jones how to calculate collapse speeds from air, to compare with WTC 7's fall time. Dr. Jones responded that it depended on many variables, and so it would be better to compare WTC7 collapse time with known controlled demolition collapse times.

Cloud dust not progressing like the mushroom cloud for WTC1 et 2

Herblay FRANCE

bonjour ,

have you noticed how the dust cloud is not progressing like the mushroom clould for WTC1 and WTC2 ?

Yours John

The complexity of measuring WTC 7's collapse time

The problem with WTC 7, as I understand, is that the *entire* collapse is not visible in any of the videos, so the precise collapse time cannot be precisely measured from the videos.

Also, in principle the fall distance analyzed should be that from the top of the building to the top of the debris pile, not to the ground. As the exact height of the debris pile is not known, it is more useful to examine the early stages of the collapse, during which the debris pile does not need to be taken into account. This is what is done on my WTC 7 page:

Of course, NIST is now saying that the building's interior collapsed before the exterior did, so that the time is much longer than 7 or 10 seconds. The problem is that their model has no resemblance to the collapse videos.