Stephen Sackur talks to Richard Leakey, the Chairman of the Kenya Wildlife Service. Africa's wildlife is one of the wonders of the natural world, but the fate of the continent's elephants, rhinos and big cats is now desperately uncertain - illegal poaching could see these great species disappear from their African heartlands. Will the fight for Africa's endangered wildlife have a happy ending?

(Photo: Richard Leakey (L) gives a press conference organised by Wildlife Direct, in Nairobi, 2014. Credit: Tony Karumba/AFP)