"Macedonian Prime Minister Zoran Zaev, center, takes a part in a march holding a banner that reads ""Come out for European Macedonia"", in downtown Skopje, Macedonia, Sunday, Sept. 16, 2018. Thousands of people marched in downtown of capital Skopje Sunday to support a forthcoming key referendum on changing Macedonia's name that could clear the way for the country to join NATO. (AP Photo/Boris Grdanoski)"