An interesting article via the UK academic website 'The Conversation' on a topic for law enforcement and first responders:Terror attacks: how psychological research can help improve the emergency response. Perhaps the military have thought this through before. Their key questions:
So in this age of unpredictability, how can the emergency services prepare themselves to respond to a terror attack...This begs the question of how the emergency services can best prepare for terror attacks when modern day terrorism is becoming less and less predictable?

(Ends with) Manchester provides a key lesson in identifying how the gap between hypothetical plans and the reality of incidents is widening. Taken together, it is hoped that the future of emergency training embeds these lessons, providing a greater focus on the need for flexible planning and dynamic decision making.

I could not identify a suitable existing thread for this.