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What was the Port Arthur Massacre?

The Port Arthur Massacre was a mass shooting in and around Port Arthur, Tasmania, Australia, on April 28–29, 1996. Gunman Martin Bryant killed 35 people and wounded 18; he later pleaded guilty and received 35 life terms. The incident was the country’s worst mass murder. Following the massacre, the National Firearms Agreement was crafted, instituting extensive licensing and registration procedures, a waiting period for gun sales, and a ban on all fully automatic or semiautomatic weapons.