Barcelona Holds Mobile World Congress

Feb. 25 (Bloomberg) -- Caroline Hyde reports on a major tech conference. She speaks with Mark Barton on Bloomberg Television's "Countdown." (Source: Bloomberg)
Aetna to Buy Humana for $37 Billion
52:47 - 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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