A U.N.-backed tribunal in Cambodia has extended the sentence of a senior Khmer Rouge commander to life in prison. Kaing Guek Eav, who is known as Duch, was initially sentenced to a term amounting to 19 years for overseeing the torture and the killing of more than 14,000 people. The initial verdict had outraged Khmer Rouge victims, who had called for Duch to be jailed for life.