Film has the power to change the way we think about ourselves and our culture. Documentarian and TED Fellow Sharmeen Obaid-Chinoy uses it to fight violence against women, turning her camera on the tradition of honor killings in Pakistan. In a stirring talk, she shares how she took her Oscar-winning film on the road in a mobile cinema, visiting small towns and villages across Pakistan -- and shifting the dynamics between women, men and society, one screening at a time.