The advancement and proliferation of autonomous drones as weapons will make terrorism easier, more destructive, and harder to trace—and Australia is underprepared. Mass drone swarm deployment by Ukraine has shown the world the destructive potential of cheap, weaponised drones, and groups such as Islamic State and Hezbollah are striving to adopt similar playbooks. In the past, these attacks generally featured a single drone, as the compartmentalised networks that terrorists rely on to avoid detection greatly complicate the multi-pilot coordination that traditional swarms require. Waypoint satellite navigation allows one operator to direct dozens of drones along programmed routes—a feature Islamic State and Hezbollah are reportedly already using. For instance, Gatwick Airport closed for two days in 2018 after a drone was sighted near the runway, stalling travel for 140,000 people.