Policymakers often disregard the basic economic principle of scarcity, for they prefer making promises to making hard choices. It turns out that this principle applies even in places hitherto treated as exempt from it,

Ukraine is moving forward with plans for joint weapons production with allies while the U.S. halts some arms shipments

IN RECENT WEEKS Ukraine has endured some of the most intense drone and missile bombardments since the start of Russia’s full-on invasion three years ago. There could scarcely be a worse time for America to halt the delivery of precious air-defence equipment.