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Military adoption and deployment of drones has ballooned in recent years, with the Russia-Ukraine war pushing their use into the popular spotlight.
The Pentagon is seeking to give Ukraine what it needs to defend against Russian drones targeting the embattled country's energy infrastructure.
The concentrated use of the drones was the second barrage in as many weeks — after months in which air attacks had become a rarity in central Kyiv.
By Inna Varenytsia