Donald Friedman, P.E., F.ASCE, is a professional engineer with more than 25 years of experience in the investigation, analysis, and restoration of landmark buildings. He has taught engineering  at Rensselaer Polytechnic Institute, the University of Massachusetts at Amherst, and Columbia University; he has spoken at numerous conferences including the fourth and fifth ASCE Forensics Conference; he is the author of After 9-11: An Engineer’s Work at the World Trade Center, based on his work at the World Trade Center site, starting September 12, 2001.
We talked about his experience at the 9/11 WTC site, and how what he saw relates to the various conspiracies regarding the collapses of the World Trade Center Buildings. We specifically discuss the recent University of Alaska study that Professor Leroy Hulsey carried out for Architects and Engineers for 9/11 Truth.  We close out with a discussion of how New York structural engineers view the 9/11 controlled demolition conspiracy theories.