[. . .]South Tower Tipping and Disintegration:
If the north tower’s antenna drop was anomalous (from the perspective of the official theory), the south tower’s collapse contained an even stranger anomaly. The uppermost floors---above the level struck by the airplane---began tipping toward the corner most damaged by the impact. According to conservation-of-momentum laws, this block of approximately 34 floors should have fallen to the ground far outside the building’s footprint. “However,” observe Paul and Hoffman, “as the top then began to fall, the rotation decelerated. Then it reversed direction [even though the] law of conservation of angular momentum states that a solid object in rotation will continue to rotate at the same speed unless acted on by a torque” (Paul and Hoffman, 2004, p. 34).
And then, in the words of Steven Jones, a physics professor at BYU, “this block turned mostly to powder in mid-air!” This disintegration stopped the tipping and allowed the uppermost floors to fall straight down into, or at least close to, the building’s footprint. As Jones notes, this extremely strange behavior was one of many things that NIST was able to ignore by virtue of the fact that its analysis, in its own words, “does not actually include the structural behavior of the tower after the conditions for collapse initiation were reached” (NIST 2005, p. 80, n. 12). This is convenient because it means that NIST did not have to answer Jones’s question: “How can we understand this strange behavior, without explosives?” (Jones, 2006).
This behavior is, however, not strange to experts in controlled demolition. Mark Loizeaux, the head of Controlled Demolition, Inc., has said:
By differentially controlling the velocity of failure in different parts of the structure, you can make it walk, you can make it spin, you can make it dance . . . . We'll have structures start facing north and end up going to the north-west. (Else, 2004)
Once again, something that is inexplicable in terms of the official theory becomes a matter of course if the theory of controlled demolition is adopted. ...