Fighter jets armed with expensive air-to-air missiles have led the way in the fight to take down the cheap drones that breach NATO airspace, a costly dynamic officials say needs to change.

NATO ally Latvia is building a Ukraine-inspired automated anti-drone wall along its entire eastern border with Russia. It is designed to make fighter jets a last line of defense, not the first, Latvian Defense Minister Raivis Melnis told Business Insider. The system is expected to be completed by the end of September.

The system, Melnis said, aims to detect and neutralize “any drone which flies in.” Fighter jets will work instead as “the secondary means” of…