FRONTLINE/World relates the story of a group of shop owners and activists who stood up to the powerful Sicilian mafia. Also, the odyssey of several dozen men from their homes in rural China to years of detention in Guantanamo Bay, Cuba, and the story of a Brazilian politician who took the name “Barack Obama” for his bid to become his town's first black mayor.

PBS's premier international newsmagazine returns with three more "stories from a small planet," starting with the inside story of a group of shop owners and young activists who stood up to the powerful Sicilian mafia. In "Taking on the Mafia," FRONTLINE/World correspondent Carola Mamberto explores the story of a restaurant owner-backed by an upstart anti-mafia movement of young people and an elite law enforcement team- who refused to pay the mafia's monthly "tax," taking a stand against mob bosses who've kept Italy in their grip for decades. Also in this hour: the odyssey of several dozen men from their homes in rural China to years of detention in Guantanamo Bay, Cuba, and the story of a Brazilian politician who took the name "Barack Obama" for his historic bid to become the first black mayor of his town.