The Man Who Knew

SEASON 21, EPISODE 3

 
Revisit the saga of FBI Agent John O'Neill and his warnings about Osama bin Laden before the 9/11 attacks. O'Neill's story provides a rare glimpse inside the FBI and helps answer the question: What did the U.S. government know and when?

FRONTLINE is investigative journalism that questions, explains and changes our world.

We tell the stories others can’t or won’t. Our investigations have helped breathe new life into terrorism cold cases, freed innocent people from jail, prompted U.N. resolutions, and spurred both policy and social change.