Protestors in Tunisia have marked the third anniversary of the event which sparked what is now known as the Arab Spring. Three years ago, a Tunisian street vendor set himself alight. Several hundred opposition activists gathered in the town of Sidi Bouzid, to mark the occasion and to protest what they regard as a lack of progress since Mohammed Bouazizi's death. Al Jazeera's Nadim Baba reports from Sidi Bouzid.
