No resistance = free fall.
The towers below the impact site for WTC 1 and 2 seemed to have no floors and core below it.
Just poof! Gone and the top floors above the impact site meet no resistance and fall at the speed of freefall.
WTC 7 a little fire, nothing so big that the fires are coming out the windows raging like crazy, you don't see that all around the building at all.
2 planes hit 2 buildings.
The buildings fall SYMMETRICALLY down at freefall speed with ZERO resistance below the impact sites.
A third building falls SYMMETRICALLY down because of fires which in the videos from all angles are not raging, there is no major smoke show as can be seen in the videos.
.....ANNNND the building falls SYMMETRICALLY.
2 planes, 3 buildings, all perfectly straight down.
If you believe that.....lol