BBC Radio 4: Kyiv hit by ballistic missiles and facing Patriot interceptor shortages

Patriot production is limited. Now it's not necessarily a question of assembly lines, so much as it is shortages of key inputs which are made by subcontractors, such as the seeker heads or the solid rocket motors, and so if one were to set up a production line in Ukraine, one would simply be creating another competitor for that same finite pool of inputs. And so I don't think you resolve the underlying scarcity."