through data of billions of americans without some suspicion. >> you have the democratic chair of the intelligence committee, dianne feinstein, agreeing with mike rogers, republican, saying this prevented terrorist attacks and saved lives. listen to mike rogers. >> within the past few years this program was used to stop a program -- excuse me. stop a terrorist attack in the united states. we know that. it's -- it's important. it fills in a little seam that we have, and it's used to make sure that there is not an international nexus to any terrorism event that they may believe is ongoing in the united states. so in that regard, it is a very valuable thing. >> all right. julie, they want specifics, though, the critics of the program, on the left or right, they say it's nice for mike rogers, dianne feinstein or president obama to say these sorts of things, that these programs are essential to