Story perspectives

San Diego Mosque Attack Live-Streamed; Teens Leave 75-Page Manifesto

5/20/2026

Summary

Story summary

The San Diego mosque attack was livestreamed and accompanied by a 75-page manifesto authored by the shooters.
Seventeen-year-old Cain Clark and eighteen-year-old Caleb Vazquez killed three people, displayed Nazi symbols, cited the Great Replacement and the 2019 Christchurch attacker, and died.
The Department of Homeland Security (DHS) memo warned that attackers livestream violence, noting the manifesto showed the teens used satellite imagery and Google Street View to map the mosque.

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Story summary

The San Diego mosque attack was livestreamed and accompanied by a 75-page manifesto authored by the shooters.
Seventeen-year-old Cain Clark and eighteen-year-old Caleb Vazquez killed three people, displayed Nazi symbols, cited the Great Replacement and the 2019 Christchurch attacker, and died.
The Department of Homeland Security (DHS) memo warned that attackers livestream violence, noting the manifesto showed the teens used satellite imagery and Google Street View to map the mosque.