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On the barren steppe of Kazakhstan there is a vast area known as the 'Polygon'. It's the former Soviet Union's nuclear weapons testing site, where they detonated more than 500 nuclear bombs over forty years. An estimated 600,000 people, living on the edge of the exclusion zone, were exposed to radiation. Today doctors are still uncovering its deadly impact as the effects of radiation are being passed down the generations. Our World has been to Kazakhstan to meet an extraordinary survivor, a celebrated artist and anti-nuclear campaigner.