A new report says the number of violent hate groups in the US has increased more than 34 percent since 2000. According to the Southern Poverty Law Center, 926 groups were active last year, up from 602 nine years ago. The report comes on the heels of a warning from the Department of Homeland Security that right-wing extremist groups are gaining new recruits by exploiting fears about the economy and the election of the nation’s first black president.