Heidi Beirich, director of research at the Southern Poverty Law Center, and New York Times reporter, Scott Shane, walk us through items from the Oslo suspect's manifesto - specifically the references to American bloggers and writers who have warned about the threat from Islam for years now.

On the anniversary of the Oklahoma City bombings and the FBI siege at the Branch Davidian compound in Waco, Texas, Heidi Beirich, director of Research at the Southern Poverty Law Center, discusses the significance of this date for fringe militant groups, and the current state of militant ...