emwazi when all these videos were coming out. the videos are a very important part of their recruiting techniques. for people who are just learning this news, you know, what does this do to those who might have been interested in joaning isis. >> it may cause them to think twice about perhaps traveling to syria or iraq to join isis. and these individuals like jihadi john or mohammed emwazi certainly wore symbols as kind of the perverse power that isis gave to people who otherwise in their home countries didn't have. that attraction may be losing a bit of its shine. losing a bit of its shine because of this strike if perhaps he is dead. but also looking again at the broader picture. isis is on the defensive. it's being pushed back in iraq, pushed back in syria.