After a trial lasting five years, an international criminal tribunal today convicted former Bosnian Serb leader Radovan Karadzic of genocide, war crimes and crimes against humanity. The atrocities date back to the 1990's, when 8000 Bosnian Muslims were slaughtered at Srebrenica and Sarajevo, which were under siege for four years. Historian Bob Donia, author of, Rodavan Karaedzic: Architect of the Bosnian Genocide, testified before the tribunal.