Gun violence has halved in Australia since laws were changed under the National Firearms Agreement adopted in the wake of the 1996 Port Arthur massacre. Before the killing of 35 people by 28-year-old Martin Bryant at Port Arthur in Tasmania, each state and territory had different gun laws. Western Australia had the strongest laws and lowest rates of gun violence; Queensland had the weakest laws and gun violence was high. In 1987, five people in the Northern Territory... (GunPolicy.org)