This video is a must watch. Richard Gage, an AIA Architect, talks about how buildings fall in the WTC pattern only in very precise, synchronized, controlled demolitions, with synchronized demolition floor by floor. They do not fall due to fire and collapse in this pattern. He shows multiple examples of how buildings fall in other ways, not in a straight down, symmetrical collapse into itself. He puts forth a hypothesis of controlled demolition and calls for an independent review of what happened on 9/11. One of the quotes from the FEMA report on this kind of inward collapse:

requires such skill that only a handful of demolition companies in the world will attempt it.

Essentially all 81 columns have to be exploded in synchrony. If there is an “injury” on one side, similar to a hurt leg, a building falls toward the injury, not down on top of itself in 6 seconds.