At 9:15am, on Friday, October 21st, 1966, the small Welsh community of Aberfan changed forever when a waste tip slid down a mountainside into the mining village. Miners were trapped underneath the sludge; the mud and waste literally engulfed the local elementary school.
144 people died in the Aberfan disaster: 116 of them were school children.
The events inspired the Bee Gees to write their first American hit, which they based upon the tragedy.
"Have you seen my wife, Mr. Jones?
Do you know what it's like on the outside?
Don't go talking too loud, you'll cause a landslide
More about the song.