There's a story in the New York Times today that details how the NSA hasn't just been tracking communications to and from (potential) foreigners of interest—it's actually tracking all emails and text messages that potentially mention these targets. That dragnet just got a lot wider. This is the actualization of the tired and at one time absurd "oops better not say bomb on email" jokes.
I know what you're thinking: Another day, another set of revelations about how the NSA has crept even deeper into our private lives than we thought the day before. And it's true. This changes the game a little bit, though. Up until now, it was understood that only Americans who were in direct contact with foreigners under surveillance were also subject to the NSA's snooping. Now, however, all it takes is one stray reference or mention of a foreigner under surveillance in an email or a text message that crosses the border to get on the NSA's radar. This represents a pretty significant expansion of the scale of the program.