International officials joined thousands of mourners in eastern Bosnia on Friday to mark 30 years since Serb forces massacred 8,000 Muslim men and boys at Srebrenica. They also attended the burial of victims whose remains are still being pieced together from mass graves.

Victims of the worst civilian massacre in Europe since World War II recall the inaction of the international community and lament that, now that war has returned to the continent, the world has failed

The march retraces the path taken by Bosniak men and boys who were killed while fleeing Bosnian Serb forces during the country’s interethnic war.