of phone calls or identifying material. what you are doing is you are listening to what at the nsa they call selecttors. that could be a terrorist cell phone in yemen being carried by a known member of al qaeda of the arainan peninsula. you're occupy that selector. you want to know -- iranian peninsula. you're up on that selector. you want to know about an al qaeda operator, they've looked at him for a long time. you got him communicating with people. you got to ask, is he communicating with anybody in the united states. they're talking about an attack in the summu.s. you run that against big data. that's all of the calls from that phone or another phone to that number, from sprint, verizon, at&t. and then you find, hey, i have five hits. you find the al qaeda planner taking hit. you throw it to the fbi and say