As police stood by Tuesday, an Iranian Basij militia member reared back to throw a stone toward the British embassy in Tehran. Other Basij militia members also took part in the attack, witnesses say. Atta Kenare /AFP/Getty Images hide caption

itoggle caption Atta Kenare /AFP/Getty Images

Thousands of protesters took part in a march against the government's proposed changes to public sector pensions in London today (Nov. 30, 2011). Oli Scarff/Getty Images hide caption

itoggle caption Oli Scarff/Getty Images

An Occupy protester is arrested early today in Los Angeles as authorities cleared the site near city hall that had been occupied for two months. Lucy Nicholson /AFP/Getty Images hide caption

itoggle caption Lucy Nicholson /AFP/Getty Images