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Ex-Khmer Rouge leaders' hearing begins in Cambodia

A UN-backed tribunal in Cambodia is holding its first hearing in the trial of four former top Khmer Rouge leaders.

The four defendants, Nuon Chea, Khieu Samphan, Ieng Sary and Ieng Thirith, face charges including genocide and crimes against humanity over the deaths of up to 2 million Cambodians in 1975-79.

Speaking from outside the Court of Cambodia, the BBC's Guy Delauney said the defendants will argue that they should not be on trial at all.

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