Facebook to emphasize friends, not news, in series of changes

SAN FRANCISCO/LONDON (Reuters) - Facebook Inc (FB.O) on Thursday began to change the way it filters posts and videos on its centerpiece News Feed, the start of what Chief Executive Mark Zuckerberg said would be a series of changes in the design of the world's largest social network.Zuckerberg, in a sweeping post on Facebook, said the company would change the filter for the News Feed to prioritize what friends and family share, while reducing the amount of non-advertising content from publishers