Countries at Risk for Mass Killings 2018–19: Early Warning Project Statistical Risk Assessment Results | Early Warning Project
Las Vegas, Orlando, Virginia Tech shootings deadliest on long list of U.S. mass shootings - National | Globalnews.ca
The 11 mass deadly school shootings that happened since Columbine - ABC News
Were AR-15s Used in These Mass Shootings? | Snopes.com
Mass shootings in the US have risen sharply in 2020 – why?
Deadliest Mass Shootings in US History: 3 Happened in Last 18 Months
Are Americans generally supportive of more restrictive gun control after so many mass shootings? - Quora
US Schools Have Survived 101 Mass Shootings in 2018 (FULL LIST)
These are the 10 deadliest mass shootings in modern U.S. history - MarketWatch
mass shooting | Britannica
Mass Shootings Have Become More Common In The U.S. | FiveThirtyEight
There have been at least 21 deadly mass shootings in the US so far in 2019 - ABC News
Mass shootings by shooter's race in the U.S. 2021 | Statista
Mass Shootings in the United States in 2021 - The New York Times
US Mass Shootings, 1982–2021: Data From Mother Jones' Investigation – Mother Jones
Mass shooting in the U.S.: Blame the NRA.
The US averaged at least 1 deadly mass shooting a month in 2018 - ABC News
Presidents and Mass Shootings | National Affairs
Mass Shootings in America | Everytown Research & Policy | Everytown Research & Policy
How Many Mass Shootings There Have Been in the US in 2019
School shootings in the US compared with the rest of the world - CNN
Mass Shootings in the United States in 2021 - The New York Times
