On "The Communicators," Julia Angwin, Senior Technology Editor at the Wall Street Journal discusses privacy issues on the internet. Angwin talks about cookies and supercookies that track where internet users go on the web. Also, she looks at Congressional efforts to address this tracking.

The Wall Street Journal has an occasional series about privacy on the internet called "What They Know," which launched in 2010. Ms Angwin is the author of "Stealing Myspace: The Battle to Control the Most Popular Website in America."