The US president is in combative mood as Nato leaders meet for a two-day summit in Ankara. There are divisions over Russia’s war in Ukraine, defence spending, and the US-Israel war in Iran with signs of the fragile ceasefire collapsing. 

The Ukrainian president, Volodymyr Zelenskyy, is holding talks with leaders as he rallies the European cause against Russia’s war that has reached the Ukrainian capital, Kyiv, as Nato allies present an increasingly united front against an unreliable US.

Lucy Hough speaks to the Guardian’s central and eastern Europe correspondent Shaun Walker