RE-POST: MASS ATTACKS IN PUBLIC SPACES: 2016 - 2020 PUBLISHED JULY 2020 United States Secret Service NATIONAL THREAT ASSESSMENT CENTER https://investorshub.advfn.com/boards/read_msg.aspx?message_id=171041448 70 page PDF https://www.secretservice.gov/sites/default/files/reports/2023-01/usss-ntac-maps-2016-2020.pdf