How new drones are sneaking past jammers on Ukraine’s front lines

Drones have transformed the war in Ukraine. Commanders sit in bunkers scanning banks of screens, as surveillance drones hunt for targets on the ground. Once they are spotted, artillery or mortars may blast them. Or bomb-dropping or kamikaze drones zoom in for the kill. The problem is that well over half the drones in the air are downed by jamming and accidents. But a new addition to the arsenal of both sides is proving more effective. They are fibre-optic drones. With no radio signal to detect or jam, they are proving much harder to stop.