Photos show people walking around in the hole in the North Tower "where 10,000 gallons of jet fuel were supposedly burning. The women (p. 27) seem to (sic) looking down to the ground" (the NIST "Response" pdf, p. 62, also shows a similar photo of the same blond woman with light-colored slacks looking over the edge of the 94th floor).
By the time the South Tower was hit, most of the North Tower’s flames had already vanished, burning for only 16 minutes.
The fire did not grow over time, probably because it quickly ran out of fuel and was suffocating rather than the sprinkler system dousing the fires.
FDNY fire fighters remain under a gag order (Rodriguezvs-1.Bush.pdf, p. 10) to not discuss the explosions they heard, felt and saw. FAA personnel are also under a 9/11 gag order.
Even the 9/11 Commission (Kean-Zelikow) Report acknowledges that "none of the [fire] chiefs present believed that a total collapse of either tower was possible" (Ch. 9, p. 302). It shocked everyone that day, amateur and professional alike, although some firefighters realized that so-called secondary explosive devices were a risk.
Um... why gag all the firefighters and FAA? If there's nothing to hide - WHY?