Twelve tonnes of ivory was set alight by President Daniel Arap Moi in Nairobi National Park in July 1989, to highlight the threat from poaching.The ivory burn was organised by conservationists who wanted to save the world's elephants. Alice Castle has been speaking to Richard Leakey, former head of the Kenya Wildlife Service.
(Photo: Ivory tusks arranged in a pile and set alight. Credit: Andrew Holbrooke/Corbis/Getty Images)