Mapping exercise

Here, the initial "blobby" objects in the screenshot of WTC 7's collapse video (on the right) are mapped to the damage shown in a pre-collapse picture (on the left). The red and green lines show the corresponding areas between the pictures.

It seems that the blobs have received unwarranted attention. It is more fruitful to demand explanations for the sudden, symmetrical onset of the destruction (meaning that all the 80 or so support columns had to give in at the same instant) and the almost vertical progression of the "collapse" to the ground at nearly freefall speed (meaning that the roof came to the ground as if resisted by mere air).

Squibs - or something else?

The following screenshots from a hi-res video show what some have intepreted as "squibs" near the top corner of WTC 7.

In the first screenshot, just before the "collapse" begins, some stationary dark objects can already be seen against, or slightly protruding from, the wall on the right below the top corner. When the building begins its steady descent to the ground, additional protruding objects become visible.



































































Main article: The Destruction of WTC 7