Examines the career of FBI agent John O'Neill, focusing on the time when he was in charge of counter-terrorism. His study of the issues convinced him that something like the September 11 attacks was likely to occur. After leaving the FBI, he became head of security at the World Trade Center, where he was among the victims killed in the terrorist attacks on September 11, 2001.

Originally televised as a segment of Frontline, April 15, 2004.

Director of photography, Ben McCoy ; editor, Steve Audette.