This video requires Flash Player version 9.0.124 or later.
|
September 21, 2009 Steven Johnson, Author, The Ghost Map: "The Myth of the Echo Chamber: Politics in the Age of the Participatory Web" |
|
|
|
|
|
|
|||||||
|
||||||||
|
This video requires Flash Player version 9.0.124 or later. |
|
|
|
||||
|
|
|||||||
