A pledge by President Donald Trump to allow Kyiv to produce US Patriot air defence missiles is a victory for Ukrainian President Volodymyr Zelensky but it could take at least a year to start producing them, defence experts say.

With its chronic shortage of interceptor missiles likely to continue until then, Kyiv faces tough choices over which targets are a priority to defend as Russia keeps pounding its cities and energy infrastructure.

Trump’s promise on Wednesday, when he met Zelensky during a Nato summit in Ankara, was a significant gesture of support that marked a huge improvement in their relationship since they clashed at the White House in February 2025.

Patriot interceptor missiles are vital for Ukraine’s defence at a time when Zelensky says Russia, whose battlefield advances have stalled, is trying to leverage its advantage in ballistic missiles by hitting Ukraine hard.

The Patriot is the only weapon in Kyiv’s arsenal capable of stopping Russian ballistic missiles. Ukraine has brought down only four of the 54 much-faster ballistic missiles launched by Russia this month.