It's not clear that the government has recorded all telephone calls? This interviewee says "All digital communications are ....are..." and uncharacteristically

It's not clear that the government has recorded all telephone calls? This interviewee says "All digital communications are ....are..." and uncharacteristically hesitates. Evidently he doesn't want to complete that sentence. So he tries again: "There's a way to look at digital communications in the past and I can't go into details." No need to - it's called 'recording the entire communication'.