Behind the Twitter IPO: What's the Strategy?

Sept. 13 (Bloomberg) -- Bloomberg senior West Coast correspondent Jon Erlihcman digs into the business of Twitter ahead of its IPO and how it looks to build revenue through mobile advertising. He speaks on Bloomberg Television's "Bloomberg Surveillance."
Obama Has 'Very Firm Policy' on E-mails, Jarrett Says
13:08 - Valerie Jarrett, a senior adviser to President Barack Obama, talks about the U.S. economy and labor policy, efforts to help adolescent girls around the world attend and stay in school, and the administration's policy on e-mail security. She speaks with Erik Schatzker and Stephanie Ruhle on Bloomberg Television's "Market Makers." (Source: Bloomberg)
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