Great-grandmother keeps Indian martial art alive

Deftly parrying her son with a bamboo cane, Meenakshi Amma belies her 78 years with her prowess at kalari, thought to be India's oldest martial art.

The great-grandmother in Kerala, southern India, has been a driving force in the revival of kalaripayattu, as the ancient practice is also known, and in encouraging girls to take it up.