This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights.
An increasing number of drones have been spotted around Denmark's airports in recent weeks. The most recent incidents around Aalborg and Billund airport caused considerable disruption followed as scheduled flights were prevented from landing or taking off.
These incidents follow several others, including at Copenhagen Airport. This is similar to the disruption that was experienced around London Gatwick airport in 2023, again causing widespread disruption.
In addition to drones being spotted around civilian airports, there have also been sightings around military airbases where the Danish F-16 and F-35 combat aircraft are based.
A civilian dr