21 workers are killed when a fireworks factory near Hallett, Okla. explodes - 1985

26 men and 1 woman are killed in the Wilberg Coal Mine Disaster near Orangeville, Utah. The disaster has been termed the worst coal mine fire in the state’s history. Federal mine safety officials issued 34 safety citations after the disaster but had inspected the mine only days before and declared it safe - 1984

A die-cast operator in Jackson, Mich. is pinned by a hydraulic Unimate robot, dies five days later. Incident is the first documented case in the U.S. of a robot killing a human - 1984