to encrypted communications. by step four, the recruit is committed and isis begins providing operational advice including this travel guide. >> and it's basically everything you'd need to know about how to get into isis territory. what you should pack. it has a checklist here of pills, band-aids, small l.e.d. flashlights, particular kinds of backpacks you should bring. >> the adversaries are exploiting the digital domain to shape perceptions in their favor. no terrorist group has been more prolific in this space. >> america's enemies are evolving, which means intelligence gathering must do the same. director james clapper. >> we try to maintain a robust set of capabilities, whether it's overhead, terrestrial, maritime, collection by aircraft, collection by humans, whatever it is. so the trick is, how do you make all the cylinders work together