Sister Simone Campbell drew national publicity in 2012 when she launched her controversial “Nuns on the Bus” tour to oppose Rep. Paul Ryan’s budget plan, but her activism on behalf of people living in poverty started decades ago. As a leader of progressive American nuns, her work has drawn considerable praise, but it has also drawn considerable criticism – sometimes, from the Vatican itself. Sister Simone joins us to discuss her activism and her book, “A Nun on the Bus: How All of Us Can Create Hope, Change, and Community”.