The Richard Dimbleby LectureBill GatesBBC World Service Duration: 28 minutesFirst broadcast: Sat 2nd Feb 2013, 19:32 on BBC World Service OnlineLatest broadcast: Sun 3rd Feb 2013, 22:32 on BBC World Service OnlineAvailable for over a yearListen nowBill Gates will outline his commitment to eradicating the debilitating disease, polio. Show more GenresFactualBrandThe Richard Dimbleby Lecture Source: BBC Online