When Al Qaeda bombs the US Embassies in Kenya and Tanzania, the FBI makes Osama bin Laden its most wanted terrorist.

After Al Qaeda bombs the USS Cole in Yemen, agents at the FBI’s New York Field Office try to figure out what the terrorist group is planning next.

On the morning of Tuesday, September 11, 2001, planes crash into the World Trade Center, the Pentagon, and a field near Shanksville, PA. FBI Agents immediately respond to the crime scenes.

When the Twin Towers fall, thousands of people are killed. At the FBI’s New York Field Office, Special Agent Steve Bongardt obtains the passenger manifests of the hijacked planes and recognizes the names of two Al Qaeda members.

Agents flock to Ground Zero in a desperate attempt to save lives. Supervisory Special Agent Mary Galligan takes charge of the 9/11 investigation, headquartered in a place no one would expect.

As the Pentagon burns, Special Agent Chris Combs leads the hunt for Flight 77’s black boxes.

Agent Bongardt discovers that the CIA withheld critical information from FBI agents that might have prevented the 9/11 attacks. Meanwhile, SSA Galligan shows FBI Director Robert Mueller and Attorney General John Ashcroft why she and her team believe that Al Qaeda is responsible.

At night in a prison in Sana’a, Yemen, Special Agent Ali Soufan interviews Osama bin Laden’s former bodyguard, Abu Jandal, to learn more about the “planes operation.”