A policeman burned as a colleague tried to help him after protesters threw a gasoline bomb in Athens, February 23, 2011

By Dimitri Messinis / Associated Press on Lens Blog

L'Orrore di Piazza Alimonda

By unknown on Italy imc via REGARDLESS

FTAA protest/riots, Quebec City, Quebec. 2001

Egypt Uprising, 2011

Untitled from Imageo

By unknown on imageo via REGARDLESS

Egyptian anti government protesters throw stones during clashes in downtown Cairo, Egypt, Thursday, Feb. 3, 2011

By Khalil Hamra / AP Photo on Plog

People carried an injured man to a makeshift hospital, Cairo, February 4, 2011

By Guy Martin / The Wall Street Journal on The Wall Street Journal

Amongst the many Egyptian flags flying in Alexandria Friday, a small green one represented Islam, February 11, 2011

By David Degner / The Wall Street Journal on The Wall Street Journal

Untitled by Ben Curtis

By Ben Curtis / AP on

Meet Me In The Basement

Bangkok Protests

Bangkok Protests

A Bangladeshi policeman threatens a child with a baton during clashes with garment workers in Dhaka on June 30, 2010

By Munir Uz Zaman / Agence France-Presse on Plog

Peaceful G20 protest at Queen & Spadina

By unknown on YouTube via Boing Boing

To Serve & Protect

Ireland, 1972

Untitled from Radikal-Foto

An anti-government protester throws a rock at a burning shopping mall on Wednesday, May 19, 2010 in Bangkok

By Wason Wanichakorn / AP Photo on Plog