Terry Gross

The number of hate groups in the United States continues to rise, says Mark Potok of the Southern Poverty Law Center. Potok discusses how the rhetoric of hate groups has increasingly entered the mainstream in the wake of the nation's changing demographics and the election of President Obama.

The bawdy, crudely animated sitcom South Park is about to celebrate its 200th episode. Creators Trey Parker and Matt Stone go behind the scenes of some of their favorite episodes and explain how they come up with the weekly parodies.

Superbug, a new book by journalist Maryn McKenna, tracks the spread of MRSA, the drug-resistant staph infection that seems to outwit every antibiotic thrown at it. McKenna explains how the bacteria has changed over the past 30 years -- and how a vaccine may be the only way to stop it.