The FBI continues to investigate a manifesto allegedly written by Dylann Roof, the suspected gunman in the Charleston church shooting.
In a lengthy essay, Roof identifies himself as a white nationalist and says he was "truly awakened" to his beliefs after reading the online propaganda of the Council of Conservative Citizens.
Richard Cohen, president of the Southern Poverty Law Center, which tracks hate crimes, tells more about the group, and the overall presence of white supremacists in the U.S.