profiles this does fit the mold. terrorist groups tend to be comprised of people who are of higher socioeconomic status than the norm. the ira was an exception, they were composed of people of lower socioeconomic status. but in general terrorism rather than insurgency tends to be a profession of the elites. >> tom, until this moment he had been called jihadi john. because no one knew his identity. the first time that he came to be seen in the public view was during james foley's execution and beheading. since then this same man with the same build with the same accent was seen in other gruesome beheading videos how significant is it that authorities now know his identity? >> well significant in terms of being able to identify other people that may be you know his friends or classmates other individuals that know him and may be inspired by him to go over and do the same thing.