San Ysidro – 1984
Columbine – 1999
Virginia Tech – 2007
https://www.nytimes.com/2007/04/16/us/16cnd-shooting.html?searchResultPosition=4
https://www.nytimes.com/2007/04/17/us/17virginia.html?searchResultPosition=6
https://www.nytimes.com/2007/04/20/us/20cnd-virginia.html?searchResultPosition=10
https://www.nytimes.com/2007/04/18/us/18pistols.html?searchResultPosition=17
https://www.nytimes.com/2007/04/20/us/20english.html?searchResultPosition=25
https://www.nytimes.com/2007/04/19/us/19weapons.html?searchResultPosition=47
Las Vegas – 2017
https://www.nytimes.com/2017/10/04/us/police-response-mass-shootings.html?searchResultPosition=8
https://www.nytimes.com/2017/10/05/us/vegas-motive-mass-shootings.html?searchResultPosition=11
https://www.nytimes.com/2017/10/02/us/las-vegas-shooting-live-updates.html?searchResultPosition=13
https://www.nytimes.com/2017/10/04/us/las-vegas-shooting.html?searchResultPosition=32
https://www.nytimes.com/2017/10/07/us/stephen-paddock-vegas.html?searchResultPosition=12
https://www.nytimes.com/2017/10/06/us/las-vegas-shooting.html?searchResultPosition=1
https://www.nytimes.com/2017/10/02/us/las-vegas-shooting.html?searchResultPosition=6