Part 3/9:
As the narrator points out, people tend to perceive what they expect or have been led to expect. Conventional wisdom dictates that buildings behave in a certain manner during structural failures. However, the events on that fateful day challenge these assumptions. Observers and analysts argue that the physical evidence does not conform to a pattern of destruction consistent with a typical building collapse. Instead, the sites demonstrated an unprecedented transformation of solid materials into dust-like particulates, seemingly in mid-air.