Chris Inglis, the agency's deputy director, was one of several government representatives—including from the FBI and the office of the Director of National Intelligence—testifying before the House Judiciary Committee this morning. Most of the testimony largely echoed previous testimony by the agencies on the topic of the government's surveillance, including a retread of the same offered examples for how the Patriot Act and Foreign Intelligence Surveillance Act had stopped terror events.
But Inglis' statement was new. Analysts look "two or three hops" from terror suspects when evaluating terror activity, Inglis revealed. Previously, the limit of how surveillance was extended had been described as two hops. This meant that if the NSA were following a phone metadata or web trail from a terror suspect, it could also look at the calls from the people that suspect has spoken with—one hop. And then, the calls that second person had also spoken with—two hops. Terror suspect to person two to person three. Two hops. And now: A third hop.
Think of it this way. Let's say the government suspects you are a terrorist and it has access to your Facebook account. If you're an American citizen, it can't do that currently (with certain exceptions)—but for the sake of argument. So all of your friends, that's one hop. Your friends' friends, whether you know them or not—two hops. Your friends' friends' friends, whoever they happen to be, are that third hop. That's a massive group of people that the NSA apparently considers fair game.
For a sense of scale, researchers at the University of Milan found in 2011 that everyone on the Internet was, on average, 4.74 steps away from anyone else. The NSA explores relationships up to three of those steps.
