SYDNEY -- A crazed gunman shot dead 35 people at Port Arthur, a historic tourist site in the Australian island state of Tasmania in April 1996, prompting then-Prime Minister John Howard to outlaw military-style assault weapons and introduce a gun buyback scheme as part of a tough set of national firearm laws. Australia's gun homicide and suicide rates have both fallen markedly in the intervening 20 years and there have been no mass shootings (defined as five or more... (GunPolicy.org)