AE911Truth - 9/11: EXPLOSIVE TESTIMONY EXCLUSIVE with Danish Chemist Niels Harrit. This interview is from the new documentary by Architects and Engineers for 9/11 Truth called 9/11: Explosive Evidence - Experts Speak Out.
Harrit is one of the scientists who discovered nano-thermite in a sample of the World Trade Center dust. He has published nearly 60 peer-reviewed papers throughout his career. Harrit says that watching the collapse of building 7 three and a half years ago triggered his skepticism of the official story.
