Last week, the European Commission condemned Russia and expressed solidarity with Romania after a drone carrying explosives struck a residential building in the Romanian border city of Galați, injuring civilians. If this is not a red line, what is? Shouldn’t it trigger a stronger response?

A Russian drone crash in Romania highlights Europe's struggle with modern aerial warfare. Drone incidents are now a near-daily occurrence across the region. European leaders have…

Russia and the European Union are trading barbs once again—this time over a drone incident in Romania that triggered a fresh diplomatic storm. After reports that a Russian-made…