Oscar Mike to the glossary. Copy that.
Plural of counterintelligence; activities and operations designed to prevent or thwart espionage, sabotage, and intelligence gathering by hostile nations, organizations, or individuals. Also refers to the agencies and personnel involved in such work.
A glorified fortress sitting smugly on a hilltop, basically a medieval real estate flex where the rich people kept their stuff and poor people kept their distance. Still metaphorically used for any heavily protected place or last stronghold. Example: The castle citadel overlooked the entire valley.
Trying to figure out who's spying on you while preventing them from learning anything useful, essentially espionage against espionage. Operations designed to detect and neutralize enemy intelligence activities.
Attacking an enemy's computer networks and digital infrastructure instead of their physical stuff. It's warfare for the internet age, featuring nation-states committing what would otherwise be serious felonies.
Weapons of mass destruction and the protocols for not dying when they're deployed—the absolute worst military shopping list.