The American Chestnut Tree is functionally extinct, according to independent scholar Donald Davis, author of the book, “The American Chestnut, An Environmental History.”  He talks with Carolyn Hutcheson of In Focus on The Storyline book series about what wiped out the gigantic Eastern Forest trees that witnessed the unfolding of American history.  In a future visit with Donald Davis, he will discuss the efforts to bring back the American Chestnut.