The U.S. move affects high-demand munitions, including Patriot missiles, the AIM-7 Sparrow air-to-air missile and shorter-range Stinger missiles.

It's a clear message to step up our own support, ramping up our European defense capacities, not only at the level of the European Union, but at the continental level,' von der Leyen told a press conference in Aarhus,

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