british girls last week showing how broad the appeal is of isis today. you now have 72 hours. reporter: the voice of some of isis brute talal videos. with a british accent. our knife will continue to strike the necks of your people. reporter: u.k. officials have identified jihadi john as mohammed emwazi a 26-year-old british national born in kuwait but raised in london. today the white house said jihadi john is a top terror target. the mind the president, he ranks highly on the list. that individual responsibility to the murder of innocent individuals. reporter: isis broad appeal from a well-off family earning a college degree in technology