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What was the Aberfan disaster?

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Friday 21 October 2016 marks the 50 year anniversary of the Aberfan disaster in Wales.

A huge coal waste tip piled high above the village of Aberfan suddenly collapsed and slid down into the village, covering houses and the local school.

The tragedy shocked people all over the world, as 144 people were killed in the disaster.

Jenny explained what happened in the Aberfan disaster 50 years ago.