U.S. President Donald Trump attended a NATO summit in Turkey, where he criticized the lack of support from allies regarding his administration's approach to Iran. The summit also saw discussions on defense spending and Trump's renewed interest in the acquisition of Greenland.

Trump's remarks on Iran came amid heightened tensions between the U.S. and the Islamic Republic. The president used the forum to express his concerns about what he perceives as insufficient backing from NATO partners on this issue.

Separately, Trump revived discussions about the possibility of the United States purchasing Greenland. This topic, along with defense spending commitments, formed part of the agenda at the summit. The combination of these issues and the ongoing Iran situation has reportedly cast a "black cloud" over the proceedings, impacting discussions on NATO unity.