People gather around a car as it is removed by a mobile crane in Tehran, Iran. The car was being driven by Iranian nuclear scientist Mostafa Ahmadi Roshan when it was targeted by a bomb Wednesday. Roshan was killed in the blast. Meghdad Madadi/AP hide caption

itoggle caption Meghdad Madadi/AP

Iranian protesters breached the gates of the British embassy in Tehran on Tuesday, tearing down the British flag and ransacking offices. Atta Kenare/AFP/Getty Images hide caption

itoggle caption Atta Kenare/AFP/Getty Images