Boston Marathon Bombing

Media Sifting Through Boston Bombing Suspects' Social Media

Brothers from Chechnya

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The suspects involved in the Boston Marathon bombings were brothers from the Russian Caucasus who'd lived in the United States for several years, though one noted on a social media website that he didn't "have a single American friend."

The elder brother, identified by several sources as Tamerlan Tsarnaev, 26, studied engineering at Bunker Hill Community College but had taken off a year to train as a boxer.