U.S. says Biden, Erdogan agreed on Afghanistan but S-400 issue is unresolved

President Joe Biden and Turkish President Tayyip Erdogan agreed in a meeting this week that Turkey would take a lead role in securing Kabul airport as the United States withdraws troops from Afghanist

President Joe Biden and Turkish President Tayyip Erdogan agreed in a meeting this week that Turkey would take a lead role in securing Kabul airport as the United States withdraws troops from Afghanistan, U.S. National Security Advisor Jake Sullivan said on Thursday. However, the two leaders were not able to resolve the long-standing issue of Turkey's purchase of Russian S-400 defense systems, Mr. Sullivan said, a bitter dispute that strained ties between the NATO allies. He added that dialogue on the issue would Mr. Sullivan told reporters that Mr. Biden and Mr. Erdogan, in their meeting on Monday at the NATO summit, discussed the Afghanistanissue. Mr. Erdogan sought certain forms of U.S. support to secure the airport and Mr. Biden committed to providing that support, Mr. Sullivan said.