NBC's Jim Maceda reports investigators say this morning's bus bomb in Volgograd, Russia, was carried out by a male suicide bomber. No group has claimed responsibility for the second deadly attack in ... more 
NBC's Jim Maceda reports investigators say this morning's bus bomb in Volgograd, Russia, was carried out by a male suicide bomber. No group has claimed responsibility for the second deadly attack in the city. less 
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Mon, Dec 30, 2013 7:32 AM EST