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Serbia's President Aleksandar Vucic, left, walks with European Union foreign policy chief Josep Borrell, right, prior to a meeting in Brussels, Thursday, Sept. 14, 2023. The leaders of Serbia and Kosovo are holding a fresh round of meetings on Thursday aimed at improving their strained relations as calls mount for a change in the Western diplomatic approach toward them amid concern that their tensions could spiral out of control. (AP Photo/Virginia Mayo)