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On Facebook's 6th birthday Witness looks at the impact social networking sites have been having on society. Are private lives now gone forever? Lucy Williamson investigates.
Last on
Thu 4 Feb 201008:50GMT
BBC World Service Online
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- Thu 4 Feb 201000:50GMTBBC World Service Online
- Thu 4 Feb 201008:50GMTBBC World Service Online
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The story of our times, told by the people who were there
