Turning Point: 9/11 and the War on Terror : Episode 4

Interviews and chilling archival recordings chronicle the chaos that unfolded during the 9/11 attacks, whose origins can be traced to the 1980s.

Survivors recount the horrors they endured on 9/11. Immediately after the attacks, George W. Bush begins charting America's aggressive military response.

Learning the hijackers benefitted from gaps in US intelligence, the White House justifies a secret surveillance program and "enhanced interrogation."

After two decades, the US aims to end its longest-ever war, but its withdrawal threatens to plunge Afghanistan back into repressive, bloody violence.