(2016-11-16) Today’s Topical Currents looks at the life of Joan Kroc. Of course, her husband Ray created the world’s largest fast-food dynasty after buying out two Southern California brothers named . . . McDonald. But his third wife—Joan—intrigued in her own right. We speak with Lisa Napoli about her book, Ray & Joan: The Man Who Made the McDonald's Fortune and the Woman Who Gave It All Away .