Between November 4 and 7, 2025, multiple drone sightings forced temporary shutdowns and flight cancellations at Brussels and Liège airports, Belgium’s main international hubs. The incidents followed weekend drone incursions near the Kleine-Brogel military base, where U.S. nuclear weapons are stored. Defense Minister Theo Francken described the drone activity as a coordinated spying operation testing Belgian security systems. Belgium plans to enhance airspace monitoring by January 2026 amid rising European drone threats.