I made an interactive tool to visualize news content about the PRISM scandal, It shows a dynamic, evolving network of people and organizations mentioned in the articles. Made with an updated version of sigma.js.
Visualization is here: http://virostatiq.com/data/prism/
More on the blog post: http://virostatiq.com/interactive-timeline-of-the-prism-scandal/
I hope you like it - I'll gladly answer any questions.