Within the lifetimes of our children, the African elephant may be extinct, hunted to death - such is the continued lure of ivory, despite international efforts to ban the ivory trade. In Tanzania, poachers have been killing an average of 30 elephants a day. The government there says it will end the slaughter. HARDtalk speaks to Lazaro Nyalandu, Tanzania's minister for natural resources and tourism. Is human greed destined to kill off Africa's elephants?