May 7th, 2013
12:02 AM ET

Inside the murky world of Jihadist websites

As we learn more about the Tsarnaev brothers, a portrait is starting to emerge that suggests the older brother, Tamerlan may have been self radicalized - relying on the internet to learn his lethal craft.

But just how big is this on-line community and can the government do anything about it?

Tom Foreman with an OutFront investigation.

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