Nathan Blecharczyk, co-founder and chief technology officer of Airbnb Inc., smiles during the 2015 Bloomberg Technology Conference in San Francisco, California, U.S., on Monday, June 15, 2015. The conference gathers global business leaders, tech influencers, top investors and entrepreneurs to shine a spotlight on how coders and coding are transforming business and fueling disruption across all industries. Photographer: David Paul Morris/Bloomberg via Getty Images
