Heavy bomber drones are increasingly being used for logistics missions. Jake Epstein/Business Insider Ukraine initially developed heavier bomber drones to drop explosives on Russian positions. But as logistics missions near the front line have grown deadlier, bombers have begun taking on new roles. Ukrainian bombers are increasingly flying logistics missions, replacing human crews. UNDISCLOSED LOCATION, Ukraine — The heavy bomber drone rose from the ground in a blast of dust and debris, its pr