On October 21, 1966, in the small mining village of Aberfan, Wales, a man-made mountain of coal waste collapsed on a primary school and nearby houses, killing 116 children and 28 adults.

Aberfan: The mistake that cost a village its children

By Ceri Jackson, BBC News

Laura Siersema is composer of Aberfan (7 pianos, voice and tools of rescue), a sponsored project of New York Foundation for the Arts (NYFA), a 501(c)(3), tax-exempt organization. 

Image courtesy South Wales Police Museum, 1966