US Says Biden, Erdogan Agreed on Afghanistan, But S-400 Issue Unresolved

U.S. President Joe Biden and Turkish President Recep Tayyip Erdogan agreed in a meeting this week that Turkey would take a lead role in securing Kabul's airport as the United States withdraws troops from Afghanistan, U.S. national security adviser Jake Sullivan said Thursday. 

The two leaders, however, could not resolve the long-standing issue of Turkey's purchase of a Russian S-400 defense system, Sullivan said, a bitter dispute that strained ties between the NATO allies. He added that dialogue on the issue would continue.  Sullivan told reporters that Biden and Erdogan, in their meeting on Monday at the NATO summit, had discussed the Afghanistan issue. Erdogan sought certain forms of U.S. support to secure the airport, and Biden committed to providing that support, Sullivan said.  "The clear commitment from the leaders was established that Turkey would play a lead role in securing Hamid Karzai International Airport, and we are now working through how to execute to get to that," Sullivan said, giving the first details from the U.S. side of the meeting, for which the Turkish presidency has not provided details.