We review nigerias failed efforts to bring back their girls and free them from the grip of boko haram. Also the reemergence of kim young un. We sift for clues to his extended absence from public life. And aarons here, having a look at the big falls in the oil prices. Absolutely, david. How low can they go . On monday, we saw the price of black gold fall to levels not seen since 2010. Why . Americas producing more of its own, so weve got an abundant supply around the world, and weaker demands. And were going to take a look at what these lower pieces mean for producers and for all of us, the consumer. Its midday here in london. 7 00 a. M. In washington. 11 00 a. M. In liberia, where the United Nations has stepped in to try to resolve a pay dispute in which Health Workers refuse to treat victims of ebola. Nurses and medical assistants are demanding their full pay in what they call danger money. Our correspondent mark doyle is at the bbcs new ebola hub bureau in accra in ghana. Hes been sp