In Ukraine's eastern Donetsk region, Mykola shows off his drone signal jammer, a device that looks like a large white thermos flask, but serves a crucial shield for his fellow soldiers on the frontline. The four-kilogram bodyworn system works to disrupt the enemy drones that now fill the skies, scrambling connections between the killer devices and their pilots. Mykola describes it as "like a bulletproof vest". More than two years into Russia's invasion, jammers have become crucial for Ukrainian forces. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES