The internet exchange is sort of the core points where all of the international cables come together, where all of the internet service providers come together, and they trade lines with each other. These are priority one targets for any sort of espionage agency, because they provide access to so many people's communications.
Edward SnowdenEvery time you pick up the phone, dial a number, write an e-mail, make a purchase, travel on the bus carrying a cell phone, swipe a card somewhere, you leave a trace, and the Government has decided that it's good idea to collect it all, everything, even if you've never been suspected of doing a crime.
Edward Snowden