The Aberfan disaster, where 144 people lost their lives, still haunts the community at the heart of the tragedy.
At 9.13am on 21 October 1966, 150,000 tonnes of coal waste slid down a hillside, engulfing Pantglas Junior School and a number of neighbouring houses.
In Aberfan more than 200 children and nine teachers were waiting for their first lesson of the day to begin when a landslide of mud and debris flooded into the classroom - 116 children and 28 adults were killed.
It was one of the worst industrial disasters Britain has ever seen.
https://www.itv.com/news/wales/2021-10-21/how-the-aberfan-disaster-is-still-being-remembered-55-years-on
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