and this from the head of the national intelligence agency. take a listen. >> we don't have any direct evidence of any terrorist involvement, yet. isil in a tweet claimed responsibility for it, and there is a very aggressive isil ch chapter in the sinai, and we don't know, and once the black boxes have been analyzed, and safely recovered, perhaps we will will know more. >> joining me now the discuss from cairo, egypt is our cnn international correspondent arwa damon and also our cnn reporter evan perez. so what is the leading of intelligence officials that there was no missile. >> well, pamela, they have the passenger manifests that has been provided to the u.s. intelligence agency to run