Today’s post comes from the Washington Post, which looks at further revelations about the NSA surveillance programme. Specifically, the Post details how the NSA tracks Americans by what is called co-traveler analytics. The piece does a really nice job of explaining how the tracking works through illustrative examples.
![Tracking via co-traveler analytics](https://coffeespoons.me/wp-content/uploads/2013/12/tracking.png)
Credit for the piece goes to the Washington Post graphics department.