Cambodia's opposition leaders have been summoned to court on suspicion of inciting civil unrest, their party said, after the government of strongman premier Hun Sen moved to suppress growing street protests. Hun Sen faces an increasing challenge to his nearly three-decade rule from striking garment workers as well as opposition supporters demanding that he step down and call a new election because of alleged vote fraud. Al Jazeera's Scott Heidler reports from Phnom Penh.