9/11 Free Fall 2/19/15: Steven Dusterwald on the duty of engineers to speak out about 9/11

Steven Dusterwald, is a licensed professional structural engineer with 37 years of experience in the field, including 25 years as owner and principal of his own structural engineering firm in Las Vegas.  In this episode of 9/11 Free Fall he discusses the controlled demolition evidence and the ductility of the steel in the towers.  He also explains why engineers everywhere have a duty to speak out about the 9/11 controlled demolition issue.

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