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Uploaded on Apr 21, 2009
In this third of three Hardfire programs, Ryan Mackey of NASA's Jet Propulsion Labs examines the physics of 9/11 and answers such questions as "Could the towers collapse as they did from an airplane impact and fires alone?" Ronald Wieck hosts. Taped February 26, 2009. See the first program at http://video.google.com/videoplay?doc... See the second program at http://video.google.com/videoplay?doc...