This weekend, memorial services are being held for the 20th anniversary of the Srebrenica massacre. In July 1995, Bosnian Serbs forces committed what is considered the worst atrocity in Europe since World War Two. They slaughtered around 8,000 Muslim men and boys around the town of Srebrenica. The genocide marked the beginning of the end of the Bosnian war. Nemanja Rujević reports.