CNN The Situation Room June 6, 2013 21:06:00
Editorial board. tom, walk us through this surveillance program. how does it work? >> we're talking about billions and billions of phone calls all across this country. let's narrow it down to one neighborhood. imagine all of those calls taking place just here. and imagine you have a computer that's tracking every time a call it made, when it's received, and how long it lasted. that is megadate. you don't know what was said, you just know that contact was made. that's the corner stone of this program as we understand it. >> even if the goft has all of this information, how does that help top te...