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.