On April 18 and 19, a mass shooting occurred in Nova Scotia when a lone gunman killed 22 people. On May 1, Canadian Prime Minster Justin Trudeau issued an executive order: “Effective immediately, it is no longer permitted to buy, sell, transport, import or use military-grade assault weapons in this country.” This ban covers 1,500 models and variants of assault-type weapons. Included on the list is the AR-15 semi-automatic rifle, used by the gunman who killed 50 people in Christchurch, New Zealand, in 2019, and in other mass shootings in the United States, including the Sandy Hook and Las Vegas massacres.