article: Mass murder
links: Columbine High School massacre Port Arthur massacre Lockerbie 2012 Aurora shooting France Hungerford London November 2015 Paris attacks Virginia Tech massacre New York Times United States Australia New York City Scotland Berkshire FBI September 11 attacks Terrorism Federal Bureau of Investigation Mental disorder Sandy Hook Elementary School shooting 2015 Ankara bombings Turkey Denmark Place fire Pan Am Flight 103 United Kingdom University of Texas massacre