When the nuns first hit the road in 2012, their mission was to collect stories of economic oppression in protest of the Paul Ryan budget — in defiant response to Pope Benedict XVI's startling decision to launch an investigation into the Leadership Conference of Women Religious, an umbrella group that represents more than 80 percent of religious sisters in the United States. The investigation was an outright attack on women's role in the Church and was referred to as "a crackdown on American nuns." Their alleged transgression was spending too much time on social justice issues, and promoting "certain radical...