December 6, 1907
Explosions rip through the Fairmont Coal Company’s No. 6 and No. 8 mines in Monongah, West Virginia. It is estimated that 362 coal miners — men and boys as young as 8 years old — died in what remains the worst mine disaster in U.S. history, but the actual number is unknown. Over 3,200 miners were killed on the job in 1907 because mining companies persistently disregarded recognized safety practices.