On the Scene: Two Explosions at Boston Marathon

April 15 (Bloomberg) -- Two "powerful explosions" reported at the Boston marathon the Boston Globe reports. Reuters reports that the Boston marathon headquarters have been locked down after the explosion. Adam Johnson and Trish Regan report on market reaction on Bloomberg Television's "Street Smart." Note: Footage may contain graphic content. (Source: Bloomberg)
Aetna to Buy Humana for $37 Billion
03:19 - 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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