Columbine Mine massacre Serene for two weeks, for the Columbine was one of the few coal mines in the state to remain in operation. On November 21, 1927, five hundred miners, some accompanied by their wives and children, arrived at the north gate just before dawn. They carried three Flags of the United States. At the direction of Josephine Roche, daughter of the recently- deceased owner of the Rocky Mountain Fuel Company, the picketers had been served coffee and doughnuts on previous mornings. That morning, the recently-disbanded state police, also known as the Colorado Rangers, were recalled to duty and would meet the
Columbine High School massacre the staircase where the massacre began was in fact their preferred spot to wait for the bombs to go off. On Tuesday morning, April 20, 1999, Harris and Klebold placed two duffel bags each containing propane bombs in the cafeteria, set to explode at approximately 11:17 a.m, during the "A" lunch shift. Propane bombs were also placed in the cafeteria's kitchen. No witness recalled seeing the duffel bags being added to the 400 or so backpacks already in the cafeteria. The security staff at Columbine did not observe the bags being placed in the cafeteria, ostensibly because a custodian was