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Killer drones pioneered in Ukraine are the weapons of the future
(www.economist.com)
This is a most excellent place for technology news and articles.
The small drones do not require a long range use, since you are going to detect them only late, and need to terminate them within few seconds.
I have seen an improvised optics on a Youtube channel where a 2 kW continuous operation fiber laser had enough energy flux at 100 m or farther.