In addition to collecting call detail records, there is some speculation that phone conversations themselves are being harvested. Recall this exchange from last month, as reported by Glenn Greenwald of The Guardian:
On Wednesday night, Burnett interviewed Tim Clemente, a former FBI counterterrorism agent, about whether the FBI would be able to discover the contents of past telephone conversations between the two. He quite clearly insisted that they could:
BURNETT: Tim, is there any way, obviously, there is a voice mail they can try to get the phone companies to give that up at this point. It’s not a voice mail. It’s just a conversation. There’s no way they actually can find out what happened, right, unless she tells them?
CLEMENTE: “No, there is a way. We certainly have ways in national security investigations to find out exactly what was said in that conversation. It’s not necessarily something that the FBI is going to want to present in court, but it may help lead the investigation and/or lead to questioning of her. We certainly can find that out.
BURNETT: “So they can actually get that? People are saying, look, that is incredible.
CLEMENTE: “No, welcome to America. All of that stuff is being captured as we speak whether we know it or like it or not.”