17 h 11 m, 6 dez 1907 ano - explosion in West Virginia's Monongah Mine
 is the nation's worst industrial disaster. 
The "official" number of deaths was 362 adult 
and child miners, but later estimates exceed 500
Descrição:
 http://freepages.history.rootsweb.ancestry.com/~pfwilson/mmd-mining1.jpg 
Adicionado na linha do tempo:
Data:
17 h 11 m, 6 dez 1907 ano
Agora
 ~ 117 years ago