Earlier this winter, Ali’s unit was flying an interceptor drone in subzero temperatures on the front when the camera suddenly froze, sabotaging their mission to detect and thwart an incoming Russian attack. Temperatures across the 1,200-kilometre (745-mile) front line have plunged to their lowest of the entire four-year Russia-Ukraine war, complicating the use of battery-powered drones, central to both sides’ military tactics. JOIN US ON TELEGRAM Follow our coverage of the war on the @Kyivpost_