Serbian President Tomislav Nikolic (R) and Milorad Dodik, president of Republika Srpska, entity of Bosnia and Herzegovina, attend the ceremony unveiling a monument dedicated to Gavrilo Princip, the Bosnian Serb who assassinated Franz Ferdinand, heir to the Austrian throne in 1914, triggering the First World War, in Belgrade, Serbia, June 28, 2015. (Xinhua/Nemanja Cabric)
