What is the name of this film?

Denzel Washington interrogates a terrorist who will not give information. They are in something like a glass room, he then takes the terrorist outside the room and ties him to a chair. He then says you will now see something unbelievable or a similar word then he brings in the terrorist's children and takes them into the glass room to interrogate them. The terrorist manages to break free and kills himself to save his children. What is the film please? First correct answer=best answer!