US President Donald Trump expressed significant disappointment with NATO during the first day of the summit in Turkiye, highlighting deep-seated tensions regarding European defense spending and the Russia-Ukraine war. Trump criticized allies like Italy, Germany, and France for failing to support US interests, specifically mentioning recent actions involving Iran. While praising his relationship with Turkish President Erdogan, Trump reignited diplomatic friction by claiming Greenland should be controlled by the United States rather than Denmark, a stance rejected by Danish Prime Minister Mette Frederiksen. Amidst these disputes, NATO Secretary General Mark Rutte emphasized the need for concrete defense spending plans to counter threats from Russia, China, North Korea, and Iran. Meanwhile, President Volodymyr Zelenskyy utilized the summit to sign new defense agreements with Estonia, the Netherlands, and Denmark, seeking increased military aid and air defense support for Ukraine.