ALT Strategies for Global Prevention and Harm Mitigation Research illustrates opportunities for public mass shooting prevention and harm mitigation. One oft-discussed avenue has been the implementation of gun legislation, such as assault weapons bans. Many of the deadliest global public mass shootings—such as the attacks in Norway, New Zealand, and Canada—involve “assault” rifles.7 These three nations subsequently took action by implementing bans on assault weapons. While it is important to recognize that most public mass shootings involve handguns, bans on assault weapons could potentially help decrease the number of fatalities during future attacks. In the United States, research has also identified other gun legislation efforts associated with significant reductions in the incidence of fatal mass shootings including handgun purchaser licensing laws and bans on large-capacity magazines. Another option may be extreme risk protection orders, which can provide important restrictions when