ANKARA, Turkey (AP) — U.S. President Donald Trump and his NATO counterparts are gathering in Turkey on Tuesday for a two-day summit that comes at a turning point in the organization’s history as the United States steps back from its traditional security role in Europe.Ahead of the meeting in Ankara, Trump has insisted on “loyalty” after some NATO countries balked at allowing U.S. forces to use their bases for attacks on Iran. He listed big European members Britain, France, Germany, Italy and Spain for criticism.A NATO summit is a highly symbolic moment when the 32 member countries of the world’s biggest military alliance underline their unshakeable commitment to each other’s security. This year, though, the trans-Atlantic bond has rarely seemed more fragile.Still, the meeting is being organized around the theme of a stronger Europe in a stronger NATO. The Trump administration has called for a reboot to a “NATO 3.0,” and it’s hoped that what this really means will become clearer over the next two days.

A presidential compound for a venuePresident Recep Tayyip Erdogan is hosting the summit at his vast Bestepe Presidential Compound on the western edge of the Turkish capital, Ankara. A new airport, converted from an old military airfield, has been unveiled especially to host NATO leaders.Security will be high. Air defenses are on alert, and tens of thousands of police will be on duty. Nearby neighborhoods are closed to traffic and some state workers have been given time off to help keep roads unclogged. Public gatherings are banned.More than a dozen people were detained in security sweeps ahead of the summit, including two journalists, the Turkish Journalists Association said.