Twitter's Costolo on Outlook, Innovation, Growth

April 30 (Bloomberg) -- Twitter Inc. Chief Executive Officer Dick Costolo talks about the outlook for the social-media website, innovation, and the company's growth model. He speaks with Emily Chang on Bloomberg Television's "Market Makers." (Source: Bloomberg)
Aetna to Buy Humana for $37 Billion
32:40 - Bloomberg's Francine Lacqua and Manus Cranny report on today's "Top Headlines." They speak on Bloomberg Television's "The Pulse." (Source: Bloomberg)
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