Navratri - what is it and why is it celebrated?

It's the Hindu festival of Navratri this week - but what is it and why is it celebrated? We'll hear the fun from some of the celebrations, and what it means to the Hindu community. And we look continue our look at Bollywood this week - this time looking at the very first silent bollywood film. And Manny looks into why the number of Asian diabetics is increasing.