Probably not long before they arrive in Oz...
"...IAF officials say guerrilla terror organizations in Lebanon, Gaza could deploy drones carrying explosives and designed to crash into targets...
...drones would range from radio-controlled model airplanes weighing a few kilos to large drones with payloads of hundreds of kilos..."
Israel sees future drone threat from Hezbollah, Hamas - Israel News, Ynetnews
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