Accused Boston Marathon bomber Tamerlan Tsarnaev may have been in touch with suspected militants before and during his visit last year to southern Russia, according to a U.S. official and sources in the region.
American officials are investigating whether Tsarnaev had been in contact over the internet with a man named William Plotnikov, a Russian-Canadian and a fellow boxer, who had converted to Islam and joined the militant insurgency in the North Caucasus. Authorities also want to know what...
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