it's is very aware of its public reputation, particularly with its followers. and as it is losing tyrerritori he wants to give encouraging words to his followers. but also this is crucial and something u.s. counterterrorist officials are worried about. as as they get squeezed there they make greater efforts to attack broad. >> whdoes it have impact when a video like this comes out. bin laden back in the nineties was appearing all the time on video. >> i think it does haven effect the fact is we've seen other leaders of isis call for attacks in the west and then attacks happened. so i think it does have an effect. >> barbara what is your