How Many Seconds Did the Towers Fall?

We don't know precisely how many seconds it took the towers to fall. As they collapsed, they kicked up an enormous amount of dust and debris,. And so there's no way to tell precisely when the top of the structure reached the ground. It was simply too obscured by dust to tell. So it's far from established that the towers fell faster than they should have. What about the claim that as they fell, puffs of dust were ejected through the windows, suggesting a series of explosions? We'll have some video you can watch of control demolitions so you can see how the puffs of air happen.