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Now Playing: 10-12-12 Marketplace Morning Report

Twitter CEO Dick Costolo discusses the role of the social media site in today's world, whether it will go public, and how it deals with privacy issues. Latino voters are becoming more and more influential in this year's in the presidential election, and a new report suggests they support Obama 3:1. Google's Android and Apple's iPhone are vying for number one and two in the smart phone market. Blackberry comes in third with 11% of the market and 90 million users around the world -- just who are these users?