Russia struck a park near a cafe in the Kharkiv region with an attack drone, killing at least six people, including a girl barely over a year old and an 11-year-old child, and injuring 15 others, among them seven children. Families who had come to spend time together became the targets of another Russian brutal attack. The deliberate use of attack drones against places where civilians gather exposes the nature of Russia’s warfare and the threat it poses far beyond Ukraine. The same technologies, components and networks that enable these attacks are part of a Russian military system that continues to adapt, expand production and exploit gaps in international restrictions. Allowing those supply chains to function means allowing Moscow to prepare its next strikes and kill civilians. We urge our partners to intensify efforts to identify and disrupt the networks supplying Russia’s drone industry, tighten sanctions, enforce export controls against circumvention, and pursue accountability for those responsible for attacks on civilians. At the same time, Ukraine needs faster deliveries of interceptors to prevent further tragedies. The most effective response to this atrocity is to make the next Russian drone harder to build, harder to launch, and easier for Ukraine to destroy.