you link provides ignorance ... the forces on the core were pushing & pulling laterally & diagonally from all directions at all different times as well as straight down as everything broke apart... the floors were thin flexible diaphragm's... your PBS presentation is just stupid... you think the collapse was orderly?... very stupid...it was very disorderly & violent... the core was anchored into rock not dirt... there was over 700ft of damaged core still standing after the outer frame & floors collapsed... been through this 20 times or more & you argue the same exact BS... the core was designed for straight down compressive force only not lateral or diagonal...that was the job of the outer frame & floor system... The Kinetic energy released in each tower was equivalent to 400000Tons of TNT in less that 15 seconds... & that's a lot of bang for the buck ... F=ma exactly how Newton wrote the law... I know it isn't as exciting as the new world order death rays & Alien Lizard Jews... just basic physics & engineering science which is sometimes boring to the clandestine crowd...

Argumentum ad hominem: a logical fallacy in which an argument is rebutted by attacking the character, motive, or other attribute of the person making the argument, or persons associated with the argument, rather than attacking the substance of the argument.

Since you are incapable of refuting the substance of anything that challenges the unsupported, unproven 9/11 theories, you have no choice but to resort to argumentum ad hominem.

The 9/11 conspiracy movement is in a perpetual spin going nowhere. The historical reality of 9/11 is undeniable. Islamic fundamentalists (Al Qaeda) were fully responsible for the planning and execution of the attack on 9/11.

A World Trade Center Collapse Investigative Resource

Welcome.

This website contains:

The only visual reconstruction of the collapses of WTC1 and 2, identifying the most probable collapse progression mechanisms of each tower.

The only accurate, detailed mapping of the earliest movement of each building available. The detailed reconstruction of the moments leading up to and of collapse initiation of each building is used to fact-check claims made by the National Institute for Standards and Technology (NIST) within their official reports on the collapses and claims made by other organizations and individuals.

Detailed criticism of the official reports on WTC1, 2 and WTC7 by the NIST, showing that claims made within the reports on all 3 buildings directly contradict what can be verified through the visual record.

Links to libraries of the largest and most complete collections of video and photographic evidence of the attacks, collapses and resulting debris available to the public.

The most accurate review of academic papers on the collapses available.

Why preserve an independent, detailed visual record of the events at the World Trade Center complex on 9-11-01?
Without an accurate and detailed visual record of what really happened, there is no way to independently verify the truth of any claim made by official sources or non-official sources.

Re-examination of the complete visual record is the only way to distinguish between false claims and the true events. Without such re-examination, any false claims can be made by any party for any reason, and the average person, now or in the future, would have no way of knowing or verifying what actually happened free from bias.

For this reason the visual record is re-constructed and re-examined as completely as possible. It is preserved so that historians and future generations which are affected by the events of 9/11/01 can fact-check what they have been told independently, free from the bias of governments or groups with their own personal motivations and interpretations.

This website provides the most complete mapping of the actual WTC Twin Towers collapse dynamics available anywhere

The World Trade Center Twin Towers Collapse Dynamics shows that the complete collapse mechanics of each tower can be written as a combination of two types of motion:

1) Uneven ROOSD: ROOSD is described in the OOS Propagation Model

2) Dropping of 4 perimeter walls

The website is written in a way that discourages blind belief in any authoritative source, no matter how paternal, while encouraging sincere fact-checking by re-examination of direct visual evidence.

All observed features are presented in a way that the reader has ample opportunity to verify all information for themselves.

All observations and measurements should be reproducible and testable by any capable person or organization. Links are provided to all source video from which measurements were taken, so any capable reader can directly cross-check results.

The Official Descriptions and Explanations of Each Collapse Are Verifiably Untrue

Preservation and re-construction of the complete visual record is all the more essential because by doing so, anyone can verify that the explanations of each collapse offered so far are verifiably untrue.

The final reports on each collapse provided by U.S. Government agencies, particularly by the National Institute of Standards and Technology (NIST), contain verifiably gross errors. These errors can be confirmed by comparing claims made within each report with the extant visual record. Moreover, no government agency or academic body acknowledges or even seems to recognize that these gross errors exist.

Such gross errors are easily spotted once the visual record of events are re-assembled and re-viewed. It is not just that such gross errors exist that is surprising, but that they have gone unnoticed in the years since the reports were written.

The author of this website compiles independent research by independent researchers
This website brings together the work of a number of independent researchers who actively share their own discoveries and observations.

There is no common underlying philosophy or group organization among these researchers.

No researcher has given the author permission speak on their behalf. Views expressed in this website are those of the author only and don't necessarily reflect opinions held any researcher whose work is presented.

When posting the work of another researcher, care is taken to present information according to the wishes of that researcher, in which case the author only acts as an editor and reviewer.

Credit for research
Many of the observations and features presented are not original discoveries by the author of this website.

Object tracking and sub-pixel measuring techniques are applied by 3 researchers independently of each other. Credits for various graphic images and measurements presented are often expressed by providing links back to the original forum posts from which the ideas evolved.

Most all gif animations and video were created by others who deserve much thanks.

Who is the Author of this website?

I am a private citizen not affiliated with any group who was quite surprised to learn that the technical history of the WTC collapses as written is fundamentally false. Direct measurements extracted from the visual record of the collapses grossly contradict history as it is generally presented.

In the course of research I was able to collect a record of movement of all 3 collapsed buildings that was verifiably superior to and grossly contradicted the record provided by U.S. Government agencies. I was able to correspond with other independent researchers who provided measurements and documented observables on a level far more intricate than that which previously existed. This website and corresponding book are a compilation of that collected data.