On December 17, 2010, a young unemployed man set himself on fire in Tunisia.
Mohammed Bouazizi took that desperate step in protest, after officials had blocked his attempts to make a living selling fruit on the street.
His self-immolation sparked a wave of anti-government protests, first in Tunisia, then all across the Middle East.
And technology and social media have played key roles in many of the pro-democracy movements of the Arab Spring.
Anchor Marco Werman speaks with Zeynep Tufekci, a fellow at the Berkman Center for Internet and Society.