But... > CIA director John Brennan said that "there are a lot of technological capabilities that are available right now that make it exceptionally difficult,

But... > CIA director John Brennan said that "there are a lot of technological capabilities that are available right now that make it exceptionally difficult, both technically as well as legally, for intelligence and security services to have the insight they need to uncover it ... And I do hope that this is going to be a wake-up call."