A small team from the Achilles Battalion of the Ukrainian 92nd Assault Brigade prepare and launch FPV self-detonating drones from an undisclosed location in the Kharkiv region towards Russian positions. Since May 10, Russian troops have carried out a new ground assault in the northeastern region, making their most significant territorial gains in 18 months. Team commander, callsign 'Calvados', says units like his are a prime target for Russia, so they have to keep their location secret. "God knows what would have happened" if it wasn’t for these drones, he says. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES