The upcoming summit, scheduled for July 7 and 8, is expected to test NATO's unity amid major rifts between the U.S. and other allies.

NATO Secretary General Mark Rutte has said he has invited Ukrainian President Volodymyr Zelenskyy to join the Alliance leaders' summit in the city of Ankara, Türkiye, in July.

Ukraine's President Volodymyr Zelensky will attend NATO's summit in the Turkish capital Ankara in July, the alliance's secretary general said Friday.