Indian Viagra' is transforming local economies in the Himalayas

A rare fungus some are calling Indian Viagra is starting to transform local economies in the Himalayas. But some of those harvesting it are now having to arm themselves to protect what has become a valuable cash crop.

There is a fungus that attacks caterpillars in the Indian Himalayas. People in north India call it kira jari. In neighbouring Tibet it is known as yarsagumba.