There are times in the course of history when the actions of ordinary citizens spark movements for change because they speak to a longing for freedom that has been building up for years. In America, think of the defiance of those patriots in Boston who refused to pay taxes to a King, or the dignity of Rosa Parks as she sat courageously in her seat. So it was in Tunisia, as that vendor's act of desperation tapped into the frustration felt throughout the country. Hundreds of protesters took to the streets, then thousands. And in the face of batons and sometimes bullets, they refused to go home -- day after day, week after week -- until a dictator of more than two decades finally left power.