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Founder Mark Zuckerberg has said that Facebook will add a "dislike" button to its social network. The 31-year-old said the button would be a way for people to express empathy.

He said Facebook was "very close" to having it ready for user testing. A "dislike" button has been constantly requested by some users since the introduction of the now-iconic "like" button in 2009.  Read more by Dave Lee, North America technology reporter for BBC News.