Earlier this year, former US public official and investment banker Katherine Austin Fitts made an astonishing claim: for years, she argued, the United States secretly spent 21 trillion dollars of taxpayer money to build an elaborate network of underground doomsday bunkers -- bunkers most of the public would not be allowed to enter. In tonight's episode, Ben, Matt and Noel dive into the conspiracy, separating fact from fiction... hopefully before the bombs drop.