MI5 chief says 9/11-style shock could be planned | The BriefBrief
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Event Brief

MI5 chief says 9/11-style shock could be planned

Filed: Sep 11, 2026 at 1:09 AM ET
Summary: Britain’s MI5 chief said intelligence services should not focus too much on past threats, warning that a new strategic shock similar to the 9/11 attacks could already be in preparation in places they are not looking. The remarks were framed as a need to adapt threat assessment.
WHO: MI5 chief
WHAT: Said a new strategic shock like the 9/11 attacks could be being prepared where intelligence services are not looking
WHEN: Sep 11, 2026 at 12:06 AM ET
WHERE: United Kingdom
WHY: A warning about the possibility of a new 9/11-style strategic shock being prepared in overlooked areas.

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