The worst terrorist attack in American history is also the least understood. It was not the action of one man - Osama bin Laden. It was the creation of a network, spanning decades. It began as a New York story, as home-grown as baseball. And while the first blood was shed in the early 1990s, the roots of the violence stretch back decades and even centuries, making the final horrendous act almost inevitable. This series will redefine our understanding of what happened, focusing primarily on the period between the 1993 World Trade Center bombing and the moment of impact on 9/11 itself. Using a tick-tock of tense cat-and-mouse narratives of terrorists and counter-terrorists, friends and foes, we follow the calamitous intersection of war and faith, natural resources and scientific progress, plane and tower. How did this happen? When did this hate begin, and why?