The Oregon school shooting is evidence that the US response to gun violence ‘has become routine’, Barack Obama says. The data compiled by the crowd-sourced site Mass Shooting Tracker reveals an even more shocking human toll: there is a mass shooting ? defined as four or more people shot in one incident ? nearly every day
ソース
994 mass shootings in 1,004 days: this is what America's gun crisis looks like | US news | The Guardian
http://www.theguardian.com/us-news/ng-interactive/2015/oct/02/mass-shootings-america-gun-violence
ソースにずらっと並んでいる表があるので、気になる方はどうぞ。