On this day in 1927, the Industrial Workers of the World (IWW) called a strike of all mine workers, leading to almost all mines in Colorado closing.
Laureano Cerrada Santos was an anarchist activist and member of the Confederación Nacional del Trabajo (CNT) who was assassinated on this day in 1975 by a member of the Spanish secret police, who escaped charges by fleeing to Canada.
Hanns Martin Schleyer was a German member of the SS, business executive, and employer and industry representative who was assassinated by the Red Army Faction (RAF) on this day in 1977.
Image: Schleyer holding a sign that says "SEIT 20 TAGEN" with an RAF logo in the background [dw.org]