Trump pointed to new efforts to scale up weapons production, although experts have questioned whether supplies of air defence missiles could indeed be scaled up in a timely fashion. Reports of shortagesSeveral reports on Monday indicated that the situation may be more pronounced than US officials have publicly said. “It’s more dangerous, and you really have to beat down any air defence system,” he added. The shortages of air defence interceptors, however, are “much more serious”, Cancian said. Meanwhile, Ukrainian President Volodymyr Zelenskyy has been warning of a dwindling supply of Patriot interceptors to block Russian attacks.