Mark Zuckerberg Q&A: Dislike Button, Ferguson, Graph Search, News Feed Study Controversy

Facebook co-founder and CEO Mark Zuckerberg held his second public question-and-answer session Thursday at the company’s headquarters in Menlo Park, Calif., and topics that came up included whether or not Facebook will add a dislike button; the social network’s role in discussions about issues such as the deaths of Michael Brown in Ferguson, Mo., and Eric Garner in Staten Island, N.Y.; whether Graph Search will launch in other languages; and the controversial News Feed study by social scientists from Facebook, Cornell University and the University of California-San Francisco.