One day this month, in a factory just outside Kyiv, Denys Shtilierman surveyed the drones that are transforming Ukraine’s fightback against Russia. Shtilierman, co-founder of the Ukrainian military technology company Fire Point, produces about 300 long- and medium-range FP-1 and FP-2 drones a day at a cost of about €50,000 each.The unmanned aerial vehicles, or UAVs, hit Russian targets every day. They play a huge role in Ukraine’s recent improvement in fortunes, together with other innovations in the country’s drone war.Kyiv has taken the war to its enemy while slowing Russia’s advances on the battlefield – despite reduced support from...