Boston Police: 'Many Casualties' in Explosion

April 15 (Bloomberg) -- Two "powerful explosions" rocked the finish line area of the Boston Marathon near Copley Plaza. Bloomberg Contributing Editor Richard Falkenrath reports on Bloomberg Television's "Street Smart." Note: Footage may contain graphic content. (Source: Bloomberg)
Aetna to Buy Humana for $37 Billion
35:29 - 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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