When Munich airport had to close on 2 October after a suspected drone incursion, dozens of flights were cancelled and thousands of passengers left stranded on the eve of a German national holiday and the famous Oktoberfest.
A week earlier, Copenhagen and Aalborg airports were closed following sightings of “unmanned aerial systems” in Danish airspace. In the month since a swarm of Russian drones violated Polish airspace – three were shot down – a rash of similar incidents has been reported across Germany, the Baltic and Nordic countries, often over power plants and military bases.
