Bodyguards protect Serbia's Prime Minister Aleksandar Vucic during unrest at a ceremony marking the 20th anniversary of the Srebrenica massacre, in Potocari, near Srebrenica, Bosnia and Herzegovina July 11, 2015. Vucic was forced to flee the ceremony on Saturday, when mourners hurled stones and bottles at him in what his government later described as an attempted assassination. (Photo by Ivan Sebalj/Reuters/Avaz)
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