Frontline: The Man Who Knew

When the Twin Towers fell on Sept. 11, 2001, among the thousands killed was the one man who may have known more about Osama bin Laden and Al Qaeda than any other person in America: John O'Neill. This is his story and the story of how, while he worked at the FBI, he was thwarted by those who should have been his allies. Extensive materials about Al-Queda and what the US knew about the group at any given time.