United States Secret Service National Threat Assessment Center: Mass Attacks in Public Places - 2019

This report provides further analysis of the thinking and behavior of mass attackers, as well as operational considerations for our public safety partners. The study examines 34 incidents of mass attacks – in which three or more people, not including the attacker(s), were harmed – that were carried out by 37 attackers in public spaces across the United States between January and December 2019. In total, 108 people were killed and an additional 178 people were injured.

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