Slate's News Dots dataviz feature shows how topics or figures in the news are connected. The interactive graphic illustrates news topics and figures as if they were in a social network. Subjects are connected if they appear together in at least two news stories, and the bigger the dot, the more connections a subject has.
News Dots works by scanning articles from major news publications and submitting them to Calais, a service that tags the content with keywords. If two subjects are tagged within a story, they become connected. The visualizer ultimately will reveal clusters of connections, as if you were imagining Facebook friends' connections and saw the various groups aggregated around schools or work.