Twitter. With more than 400 million users a month, it’s the second-most-popular social network in the world. A report from the Pew Research Center's Journalism Project found that nearly ten percent of adults get their news from Twitter.
Here in San Francisco, the company’s officially part of the city’s fabric -- online and off. Holly Kernan interviewed New York Times Tech columnist Nick Bilton, the author of “Hatching Twitter: A story of Money, Power, Friendship and Betrayal."