Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Protests in Iran Shatter Image of a United Country Jamie Dettmer The outrage was aired first of all on social media forums -- before spilling chaotically on to the streets with Saturday's mass protests catching Iranian authorities off-guard and exposing how many Iranians hold the country's embattled regime in disdain. After three days of public denials, the confession Saturday by the Iranian military that it was behind last week's downing of a Ukrainian airliner sparked fury and demands for the country's supreme leader, Ayatollah Ali Khamenei, to resign. The belated admission -- after days of denials -- of the unintentional shooting down of the passenger jet, and Khamenei's promise the culprits will be punished, appears not to have stanched a flood of anger that broke through the narrow limits of criticism Iranian authorities allow. Saturday's protests come weeks after Iran faced the country's bloodiest unrest since the 1979 Islamic revolution. Dozens are thought to have been killed. Videos posted on social media showed hundreds of mainly young people gathering to protest at several universities in the Iranian capital. They had come ostensibly to honor the 176 who died when the Iranian military accidentally shot down the airliner, apparently mistaking it for a U.S. cruise missile. .