FBI agent on working with extremists
Media playback is unsupported on your device
Video

FBI undercover agent on his work with extremists

Tamer El-Noury is just one of the names this undercover FBI agent goes by when he infiltrates extremist networks in North America.

He spoke to the BBC's Frank Gardner - with the FBI keeping a close eye - about his work.

("Tamer El-Noury" is an alias, and his responses have been re-voiced to protect his identity.)

  • 23 Oct 2017