Serbia's President Boris Tadic attends Christmas liturgy during his visit to a 14th century Orthodox monastery in the western Kosovo town of Decani January 7, 2012. Kosovo Albanian protesters hurled stones at an armoured motorcade carrying Serbian President Boris Tadic on Friday as he marked Orthodox Christmas in the former Serbian province, where Serb-Albanian tensions have resurfaced. REUTERS/Hazir Reka (KOSOVO - Tags: RELIGION POLITICS)