A key trial opened in Belgrade Monday for 36 suspects charged with assassinating Serbia's prime minister in order to bring allies of Slobodan Milosevic back to power. Zoran Djindjic, Serbia's first democratic premier in more than 50 years, was fatally shot March 12 in a sniper attack as he stepped out of his car in front of government headquarters in downtown Belgrade. A total of 44 people -- including the prime suspect, Milorad Lukovic, the commander of a notorious paramilitary force under Milosevic -- have been charged in connection with the assassination. Thirty-six went on trial Monday, while the rest will be tried separately for conspiracy in the murder.