The Spreading Chestnut Trees

To see a mature American Chestnut in nature is a rarity. The trees, which once took up about a quarter of Eastern US forests, were driven to near-extinction by a fungal disease introduced about 100 years ago. AM 580's Ali Kawa speaks with Purdue University scientist Doug Jacobs (left, under a chestnut in Wisconsin), who is working to restore the once-tremendously valuable American Chestnut.