Facebook CEO Zuckerberg speaks during a media event at the company's headquarters in Menlo Park, California

 
Facebook CEO Zuckerberg speaks during a media event at the company
Facebook Chief Executive Mark Zuckerberg speaks during a media event at the company's headquarters in Menlo Park, California January 15, 2013. REUTERS/Robert Galbraith (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY)