REFILE - ADDING BYLINE Facebook Chief Executive Officer Mark Zuckerberg smiles as he arrives at the stage to deliver a keynote speech during the Mobile World Congress in Barcelona February 24, ... more 
REFILE - ADDING BYLINE Facebook Chief Executive Officer Mark Zuckerberg smiles as he arrives at the stage to deliver a keynote speech during the Mobile World Congress in Barcelona February 24, 2014. Zuckerberg will take a victory lap at the world's largest mobile technology conference in Barcelona on Monday, after beating out Google Inc in a $19 billion acquisition of free messaging service WhatsApp. REUTERS/Albert Gea (SPAIN - Tags: BUSINESS TELECOMS) less 
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Reuters | Photo By ALBERT GEA / REUTERS
Mon, Feb 24, 2014 3:31 PM EST