Europe's worst massacre since World War II began approximately 17 years ago today, when Serbian forces entered the United Nations–protected City of Srebrenica in Bosnia-Herzegovina. Some 8000 men and boys were separated from women, murdered and buried in mass graves. President Obama said today there's no doubt that Serbian forces committed genocide in Srebrenica. Bodies are still being discovered in mass graves, and 520 were re-buried today. Aida Cerkez reports on the Balkans for the Associated Press.