The head of MI5, Sir Ken McCallum, has given his annual speech at the intelligence service's headquarters in London.
Sir Ken spoke about counter-terrorism, combatting state threats and warned about the emerging threat posed by AI (artificial intelligence).
BBC Security Correspondent Frank Gardner was in the room during the speech and takes us through the key takeaways.
More on this story: MI5 chief warns of threats to UK from Russia, Iran and AI
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