How Columbine changed the way police respond to mass shooting | CNN
Guns | Gallup Historical Trends
Fact Check: Did Australia Solve Mass Shootings by 'Surrendering' Its Guns?
Mass shootings: How U.S. gun culture compares with the rest of the world - Washington Post
Olympic goal is in Sergei's genes - Shooting Australia
These women survived a California school shooting 30 years ago | CNN
Australia slipping backwards on National Firearms Agreement - The University of Sydney
Santa Fe High School shooting: The lessons the U.S. still hasn't learned - The Washington Post
Mass Shootings in the United States | RAND
As mass shootings in America continue, we asked 12 mass killers: 'What would have stopped you?' | British GQ | British GQ
10 myths about school shootings
Outrage and inaction: how the push for US gun control rises and falls with each school shooting | US gun control | The Guardian
Mass shooting - Wikipedia
Thousand Oaks: Australia changed its gun laws after 1996 mass shooting
Gun Control: How Australia Stopped Mass Shootings | Fortune
What have we learned from the time trend of mass shootings in the U.S.? | PLOS ONE
Eighteen killed in German school shooting | World news | The Guardian
/cdn.vox-cdn.com/uploads/chorus_image/image/59706287/GettyImages-158581520.0.0.jpg "Australia's mass shooting is not proof gun control doesn't work - Vox")
Australia's mass shooting is not proof gun control doesn't work - Vox
What can Australia teach us about mass shootings? - CBS News
Other Countries Had Mass Shootings. Then They Changed Their Gun Laws. - The New York Times
U.S. Gun Policy: Global Comparisons | Council on Foreign Relations
