The people who did the investigation were not the people who ordered the steel removed. That was done at a time when investigation of modes of collapse was not a priority.Yes, its an insult to the families of those lost and the pubic as a whole to so disrespect their loss and forward what is obviously a failed reconstruction. We can dredge up an airplane from the bottom of the ocean and piece it back together over years in a hanger somewhere, in order to better understand how that failure occurred and prevent it from happening again. but we can't even map the fall pattern of a 47' office building, one of the most secure in the world, housing thousands of people, and typical of hundreds of other buildings. Yes I think it one of the greatest tragedies of our time to have been so completly and obviously lied to that a simple review of the film evidence by any open minded person will reveal flaws so gross that no other rational conclusion can be reached but that NIST is ignoring evidence and presenting wildly unlikely scenarios in order to not explain what exactly happened that tragic day.
Its embarrassing and at the least it does nothing to lessen the tragedy of that day.
The simulations were very accurate, given the limitations. The showed what probably happened. It was a successful investigation, and many changes to building codes came out of it.