As the world spotlight hits China this summer, reporter Evan Osnos goes inside one of the country’s most important, but least understood movements — China’s underground churches.

As the world spotlight hits China this summer, reporter Evan Osnos goes inside one of the country's most important, but least understood movements - China's underground churches. A joint project of FRONTLINE/World and the Chicago Tribune , "Jesus in China" examines the wave of Christianity that has been sweeping across the country in recent years and the different ways the Chinese ruling party - officially atheist - is now racing to control it.  Also in this hour, two more "stories from a small planet," including "Living on the Edge," producer/reporter Martin Smith's sobering look at communities around the world already devastated by global climate change, and the story of a new movement of architects out to help solve humanitarian problems through design.