Despite attempts by Iran's government to quell protests aginst the re-election of Mahmoud Ahmadinejad, the president, the voices of opposition will not go away.<br /><br />People in at least 50 cities across the world are getting together for a global day of action demanding an end to the government crackdown on protesters.<br /><br />Al Jazeera's Roza Ibragimova reports.
