Bombing Suspects' Attack On Boston Linked To 'Social Media Radicalization'

Fiona Hill, a Caucasus specialist at the Brookings Institution think tank, said the conflict in Chechnya is used as a recruiting tool for Al-Qaeda. "Videos from Chechnya are all over the Internet. They're constantly packaged as part of the Al-Qaeda network recruitment," she said. Dzhokhar used Twitter and VKontakte -- the Russian equivalent of Facebook -- where his profile identifies "Islam" as his world view, lists information about Chechnya and Islam, and relates jokes about the unfair treatme...