National Geographic Extreme Neighbors: Most Americans think the Ku Klux Klan (KKK) is a thing of the past, but for residents of Harmony, N.C., they're the neighbors. When KKK members Chris and Tanya plan a rally in Harmony, residents set out to stop them. Led by Barbara and Terry, citizens of Harmony do everything in their power to make the Klan feel as unwelcome as possible. However, Barbara and Terry decide to attend the rally themselves to see if they can understand why their extreme neighbor do what they do.