Terry Gross

Nora Volkow, director of the National Institute on Drug Abuse, ranks as one of the U.S.'s leading addiction researchers. She's helped demonstrate that addiction is in fact a disease — a disease of the brain — and that all addictions, whether it's to drugs, alcohol, tobacco, sex, gambling or even food, are more alike than was previously thought.

Volkow, who's the great-granddaughter of Russian revolutionary Leon Trotsky, grew up in Mexico City — in the house where her famous ancestor was assassinated.

Jonathan Oberlander, a political scientist with an expertise in health-care politics and policy, discusses problems with the U.S. health-care system and considers how other countries handle health care. He'll also give us a critique of Michael Moore's documentary Sicko. Oberlander is an associate professor at the University of North Carolina at Chapel Hill.

She was a home-grown phenomenon, an operatic soprano trained entirely in the U.S. in an era when most singers developed their craft in Europe, and she made a notable second career after her retirement as a formidable arts administrator and advocate. Fresh Air spoke with her in 1985.