bild

In this photo taken on Tuesday, Oct. 17, 2017, Serbian Army soldiers perform during rehearsal exercise in Batajnica, military airport near Belgrade, Serbia. Serbia on Thursday, Dec. 15, 2022 formally demanded that its security forces return to the breakaway former province of Kosovo, despite warnings from the West that such calls are unlikely to be accepted and only add to tensions in that part of the Balkans. (AP Photo/Darko Vojinovic)