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Extraordinary personal stories from around the world.
Today, Rob Hamill, a New Zealand Olympic rower talks to Lucy Ash about seeking justice for his brother Kerry, who was murdered by the Khmer Rouge.
Rob went to the war crimes tribunal in Cambodia accompanied by a film crew. They recorded the trial and Rob's personal journey of discovery into how and where his brother died.
The film, due out next month, is called Brother Number One - that was the name given to Comrade Duch by the Khmer Rouge.