Interesting long article at the 911 Forum (http://the911forum.freeforums.org/oos-collapse-model-t361.html) summarizing the ROOSD model that Major_Tom has developed over time. ROOSD stands for Runaway Open Office Space Destruction. I covers a lot of detail. Note that it doesn't cover the initialization event, but given that the top of the towers drop down, slightly displaced at the beginning, it proports that the rest of the collapse can be modelled by the ROOSD system.

He says:

"This version will sent to a number of engineers and engineering organizations, including the NIST, Dr Bazant, Richard Gage and all the crew to solicit feedback once it is cleaned up.

Why do I bother?

I want to get feedback from them and include the reactions within the final version."