Killing for Conservation

India is that rare thing in animal conservation: a success story. The country has seen the population of many endangered species, including tigers and rhinos, rise in recent years. Nowhere exemplifies that success more than Kaziranga National Park in Assam. But for many villagers living near Kaziranga, the park's gains have had a devastating cost. Some have been mistakenly shot as suspected poachers, and entire communities face forced evictions from their homes. Justin Rowlatt reports.