The 2026 FIFA World Cup, scheduled from 11 June to 19 July 2026 across the United States, Mexico, and Canada, represents the largest tournament in FIFA history with 48 teams and 16 host cities. The event’s geographic dispersion, extended duration, and unprecedented scale create a complex and multi-layered threat environment. Unlike previous tournaments concentrated in one country, the tri-national structure introduces cross-border vulnerabilities, uneven security capabilities, and logistical challenges. The tournament will generate dense concentrations of spectators not only inside stadiums but across fan zones, transport hubs, hospitality venues, and public gathering areas, significantly expanding the attack surface.