Support Your Freedom to Speak:
David Chandler 9-11 Anniversary Physics Talk (cited in Calling Out Bravo-7: 2020 Edition)
Published 4 years ago
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With a clarity that both the layperson and the scientist can understand, David will answer these questions as he challenges the National Institute of Standards and Technology’s (NIST’s) reports on the building collapses on 9/11.

1) What is the official story of what happened to the World Trade Center (WTC) buildings 1, 2, and 7 on 9/11?

2) NIST has had an excellent reputation in the past. Why should we doubt its report on the collapse of the WTC buildings? Was NIST’s report actually fraudulent?

3) Building 7 (WTC 7) fell at absolute free fall for the first 2.5 seconds. What is free fall? How is it measured? Can a building naturally free fall while crushing itself, as the official story claims?

4) The North Tower (WTC 1) fell with uniform downward acceleration (but less than free fall). What are the implications in this case?

5) What do the free fall of WTC 7 and the near free fall of the Twin Towers tell us about the nature of the 9/11 event? What are the larger implications for today?

David maintains a website in collaboration with several other scientific researchers at

BIO: David S. Chandler has a BS in physics from Harvey Mudd College and an MS in mathematics from California Polytechnic University. He has taught physics, mathematics, and astronomy at the high school and college levels since 1972. He is now retired and living in Denver, Colorado.

Since about 2007 he has been active as a researcher with what he calls the “science wing” of the 9/11 Truth Movement. He is currently the Coordinator of Scientists for 9/11 Truth, and worked for several years with Architects and Engineers for 9/11 Truth.

David has authored and co-authored a number of scientific papers on the events of 9/11 including Destruction of the World Trade Center North Tower and Fundamental Physics. He has written a six-part serial essay posted at, titled Free Fall, which is the basis for this talk.
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