The recent opening of the new European Central Bank building in Frankfurt was met with violent protests. In the wake of this, and other protests which have turned violent, is it always possible to achieve peaceful protest? Alexis Goldstein of The Other 98% - an off-shoot of Occupy Wall Street, and Revathy Ashok of the Political Action Committee in Bangalore discuss this issue.

(Photo: A cyclist going past a burning barricade near the new ECB building. Credit: Odd Andersen/AFP/Getty Images)