Warren Buffett's son Howard and his son Howard Jr. wrote a book called "Forty Chances - Finding Hope in a Hungry World."
In the video below the two Howard's discuss the book and its subject matter with the students of the University of Nebraska.
Warren't son Howard of course is the man who will take over as chairman of Berkshire Hathaway (BRK.A, Financial)(BRK.B) when Warren relinquishes the post.