Rhiannon Giddens says the banjo has an ancient and varied history, rooted in Africa

Musician Rhiannon Giddens is a modern-day Renaissance woman who trained as an opera singer before veering into folk music. She's an award-winning composer and multi-instrumentalist. But she is first and foremost a dedicated banjo player who has been researching and teaching the instrument's African heritage. The World's Carolyn Beeler speaks with Giddens about the origins of the banjo.