Mark Zuckerberg
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Facebook founder Mark Zuckerberg gives reasons for 'dislike' button

16 September 2015 Last updated at 02:19 BST

Facebook is to add a "dislike" button to its social network, founder Mark Zuckerberg has said.

In a question-and-answer session held at Facebook's headquarters in Menlo Park, California, he said the button would be a way for people to express empathy.

And he said Facebook was "very close" to having it ready for user testing.