BELGRADE, Serbia-Montenegro - The alleged assassin of Serb Prime Minister Zoran Djindjic told police days after the slaying that he killed the reformist leader to stop the extradition of Serbs to the U.N. war crimes tribunal, according to a confession read out Thursday at his trial. Zvezdan Jovanovic, a former commander of an elite police unit, is charged with firing the fatal shots that killed Djindjic on March 12 as he stepped out of his car in front of the government headquarters in central Belgrade. "I personally killed Zoran Djindjic," Jovanovic reportedly said during an interrogation after his arrest in...