Tens of thousands of people attended a memorial ceremony today, June 11, marking the 15th anniversary of the Srebrenica massacre, when Bosnian Serb paramilitaries executed more than 8,000 Muslim men and boys toward the end of the war in Bosnia-Herzegovina. The massacre, deemed genocide by the UN war crimes court and the International Court of Justice, was the worst atrocity in Europe since World War II. The ceremony included the burial of 775 recently identified victims, who will join the 3,749 already there.