Mysterious drones have been spotted at night at airports across Europe. How worried should we be?

Mysterious drones have been spotted at night at airports across Europe, sparking fear and speculation of potential hybrid warfare tactics by Russia. Recent drone sightings near critical infrastructure have raised concerns in Nato countries, leading to discussions about a possible "drone wall" for protection. The plan involves an integrated defense system to detect and track incoming drones, but experts emphasize the need for a comprehensive approach beyond just a physical barrier to address evolving drone threats.