The system’s high performance has already been proven in real-world conditions MOSCOW, May 25. /TASS/. Russia’s Rostec State Corporation has developed the Citadel anti-aircraft artillery system to protect against various types of enemy drones, Rostec reported, noting that it will be showcased for the first time at the First International Security Forum. "Rostec State Corporation will unveil the newest anti-aircraft artillery system, Citadel, at the First International Security Forum. It