20% of u.s. calls. in general, they do not look at cell phone records. >> two stanford students put apps on phones and looked at their metadata they tried to dedeuce from other means from just the phone records, they could tell most of the time what your religion was, what doctor you were going to see, what kind of diseases you had. and even what kind of procedures you had. >> this program -- you get no names, no addresses, no personal identifying information. the nsa doesn't know you exist. they just have phone numbers and only look further if the terrorist calls the number. >> the founding fathers didn't like the idea of general warrants. warrants that were not individualized that didn't have any suggestion of suspicion, and weren't signed by an independent judge. that's what the fourth amendment is about. one warrant and the name says verizon they collect all the information from all the