Velvet Or Violent: What Makes A Successful Revolution?

Many have praised the non-violent protests that pushed Egyptian Hosni Mubarak from power this year. But some activists in Cairo's Tahrir Square say the revolution hasn't resulted in the democracy they wanted, and violence may be needed.

Thanassis Cambanis writes in the Boston Globe: "Among the dedicated core of Egyptian street activists who have been at the forefront of the protests since the beginning, an increasing number have begun to argue that a regime steeped in violence will only respond to force."