Facebook CEO <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Mark+Zuckerberg&family=editorial&specificpeople=4841191 ng-click='$event.stopPropagation()'>Mark Zuckerberg</a> delivers the opening kenote at the Facebook f8 conference on April 30, 2014 in San Francisco, California. Facebook CEO <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Mark+Zuckerberg&family=editorial&specificpeople=4841191 ng-click='$event.stopPropagation()'>Mark Zuckerberg</a> kicked off the annual one-day F8 developers conference.