How the Arab Spring began
A year ago this weekend a 26-year-old Tunisian named Mohamed Bouazizi set himself on fire.
It was an extreme act by a young man who had reached the end of his tether after being banned from selling fruit to earn a living but it triggered a remarkable series of events that became known as the Arab Spring.
Our security correspondent, Frank Gardner, looks back at a tumultuous year.
16 Dec 2011