Turkish President Recep Tayyip Erdogan and NATO Secretary General Mark Rutte on Monday discussed the "growing challenges” to the alliance’s collective security. Meeting in the Turkish capital Ankara, the two leaders discussed the "the threat of terrorism, the war in Ukraine, and the crisis in the Middle East," Rutte said on X.

NATO Secretary General Mark Rutte met with President-elect Donald Trump in Palm Beach, Fla., on Saturday to discuss global security issues.

The meeting comes amid growing fears among NATO members that the U.S. president-elect could destabilize the defense alliance.