It became the most controversial building in America, a mostly derelict property in lower Manhattan made infamous overnight as the Ground Zero Mosque. Going beyond frenzied media portraits at the time, FRONTLINE tells the inside stories of Sharif El-Gamal, a real estate developer, and of the victims' relatives and anti-Islam activists who helped turn his project into a continuing battle over faith, values, and the meaning of being American.

Also in this hour, Adam Davidson of NPR's "Planet Money" returns to Haiti to meet a man with an unlikely plan to help turn around his country's economy through tourism.