Years have passed since the World Trade Center attacks of September 11, 2001, and yet there are still many unanswered questions surrounding that fateful day that changed our nation forever.
What don't we know about 9/11? A series of scientists gather for the Toronto Hearings a decade after the events of September 11, 2001, to present their theories on what truly occurred that day.
S1E4 1hr 40 min