The last real mainstream mass shooting was Columbine and a few smaller ones there after. Australia was able to ban guns swiftly after their Tasmania false flag. During the 90’s most countries who signed the treaty for UN disarmament were shooting their population for policy change. Port Arthur police training video was grusome and could only have been done by professional shooters. Most cops and federal agents stated that a person if 78 iq could not of double tapped dozens of people in the head firing at hip without any training. Luckily, now the majority of shootings and terrorist attacks are fake.