CNN CNN Newsroom June 13, 2013 18:07:00
Your phone calls is legal. it is effective. and the more we talk about the details of this, the more we compromise the whole purpose of doing it in the first place. >> i can tell you every time that we have a leak like this, if you follow it up and you look at the intelligence afterwards, there are persons who are out there who follow this very, very, very, very closely. and they are looking for ways around it. one of the great vulnerabilities that terrorists understand is their communications. ...
Source: archive.org