Endangered species threatens livelihoods

Wild Asian elephants have been wreaking havoc in villages in Southwest China as their habitat is destroyed and they're forced to search for food. Yang Yao reports from Huashiban, Yunnan province.

Cai Yansheng will never forget March 13. It was the day his wife was trampled to death by rampaging wild elephants searching for food.

Early in the morning, Cai's wife, Zhang Defen, 61, left home to sprinkle pesticide over the couple's banana fields. "She was only supposed to work on the land for an hour or so," Cai said.