. >>> we want to get more from former british army chief, lord richard dannon. we thank you so much for talking with us, sir. want to know what you think about this continuing, now, method. these brutal tactics, of beheadings that we're seeing on behalf of i.s.i.s. >> well, it's a despicable tactic to follow. and of course, one has to say one's heart goes out to david haines' family, who must be going through the most terrible experience. my heart just goes out to them. but trying to keep the big ger picture in mind. this is a terror tactic. this is designed to make governments change their mind and their approach. i'm afraid that would be the wrong thing to do. and what these videos show, and the murder of david haines shows, is that islamic state has got to be stopped. their fighters have to be contained. and that barbaric and evil regime has got to be destroyed. and that's increasingly the wish, not just of those in the west who are appalled by behavior, but increasingly, in the muslim world, where they see the distortion of their religion. and i think presid