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In this photo provided by the Serbian Defense Ministry Press Service, Serbian army self-propelled 155 mm gun-howitzers are seen on position near administrative line with Kosovo, south Serbia, Monday, Dec. 26, 2022. Kosovo remains a potential flashpoint in the Balkans years after the 1998-99 war that ended with NATO intervention. Serbia doesn't recognize the 2008 declaration of independence of its former province, while Western efforts to mediate a solution so far have failed. (Serbian Defense Ministry Press Service via AP)