'Islamic State's' most wanted - Part 2: Resistance

As 'Islamic State' strengthened its grip on power in Raqqa, they began to hunt for the teenagers.

Producer/reporter: Chloe Hadjimatheou

Arabic language producer: Faisal Irshaid

Video editor: Amanda Gunn

Camera: Tony Jolliffe

Animator: Wael Toubaji

Executive producer: Richard Knight