Mass shootings at US schools, colleges killed 175 in over two decades

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Mass shooters have killed hundreds of people throughout U.S. history in realms like stores, theaters and workplaces, but it is in schools and colleges where the carnage reverberates perhaps most keenly places filled with children of tender ages, older students aspiring to new heights and the teachers planting the seeds of knowledge, their journeys all cut short...

If a mass shooting is defined as resulting in the death of four or more people, not including the perpetrator, 175 people have died in 15 such events connected to U.S. schools and colleges from 1999's Columbine High School massacre to Monday's shooting in Nashville, Tennessee..

A 22-year-old college student frustrated over sexual rejections fatally stabbed or shot six students near the school in Isla Vista, California, and injured several others before he killed himself...

The gunman then killed himself.. A 32-year-old man entered an Amish schoolhouse near Lancaster, Pennsylvania, dismissed the boys, bound the girls, and fatally shot five of them before killing himself..

A 16-year-old student killed his grandfather and the man's companion at their Minnesota home, then went to nearby Red Lake High School, where he killed five students, a teacher and a security guard before shooting himself...