2 things to know about America's mass shooting epidemic - Vox

2 things to know about America's mass shooting epidemic - Vox: "There's some debate about how to define mass shootings. But using the definition many people operate under — shootings at a public place in which the shooter murdered four or more people, excluding domestic, gang, and drug violence — they appear to be getting more common, as the chart above from Mother Jones, based on an analysis from Harvard School of Public Health, shows."



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