13:06NewshourObama: I won’t allow a caliphateBBC World Service Duration: 55 minutes Sat 9th Aug 2014, 13:06 on BBC World Service OnlineAvailable for over a yearListen nowMore airdrops for Yazidis stranded in N Iraq; Watergate editor 40 years on; the place called BlandGenresNewsBrandNewshour Source: BBC Online