Anne Keast-Butler’s address marks a definitive moment in national cyber strategy. GCHQ is now openly developing an 'AI Cyber Shield' to counter the 'unstoppable force' of AI-driven offensive operations from Russia and China. This confirms that the 'AI Arms Race' has moved from theoretical research to active deployment in national defense. The focus is on 'Autonomous Defense'—systems that can identify and patch vulnerabilities in critical infrastructure faster than an AI-powered attacker can exploit them.