across various parts of the middle east north africa eyes targeted on the united states whatever they call themselves it will be a difficult enemy increasingly to track down. jake? >> let's talk about this isis claim of responsibility with cnn terror analyst paul cruickshank. he is also the author of "agent storm, my life inside al qaeda and the cia." thanks for being here. do you think this attack was orchestrated by isis leadership or is it just an idea once again of these lone wolf packs emerging self-radicalized? >> i think the jury is still very much out on that. clearly isis have released this audio claim of responsibility but they offer no proof whatsoever that they were behind the attack. tunisian authorities have so far said they can't link this attack to an organized terrorist group. of course they may do in the hours ahead. as barbara was suggesting this