If you care even a little about state surveillance—or if you've forgotten/are having trouble wrapping your head around all the NSA-related news stories from the past year—you should keep this chart by ProPublica handy.

Among the things worth being reminded about: the NSA testing bulk collection of location data from American cell phones in 2010 and 2011; British efforts to monitor YouTube views, Facebook likes, and Blogger visits; attempts to develop techniques to track Tor users; collection of images from emails for facial-recognition software; mass collections of data about credit-card purchases; the hacking of Al Jazeera, OPEC, and Angela Merkel's cell phone; on and on and on.