India's effort to clean up sacred but polluted Ganga River

The Ganga River, known as the Ganges under British rule, is one of the most revered waterways in the world -- and also among the most polluted. Stretching from the Himalayan foothills to the Bay of Bengal, it provides water to nearly half a billion people, more than any other river in the world. Special correspondent Fred de Sam Lazaro reports from India on the latest efforts to clean the river.