Iraqi riot police officers prevent anti-government protesters from entering the heavily guarded Green Zone during a demonstration in Baghdad Friday, Feb. 25, 2011. Thousands marched on government buildings and clashed with security forces in cities across Iraq on Friday, in the largest and most violent anti-government protests here since political unrest began spreading in the Arab world several weeks ago. (AP Photo/Hadi Mizban)
Iraqi riot police officers prevent anti-government protesters from entering the heavily guarded Green Zone during a demonstration in Baghdad Friday, Feb. 25, 2011. Thousands marched on government buildings and clashed with security forces in cities across Iraq on Friday, in the largest and most violent anti-government protests here since political unrest began spreading in the Arab world several weeks ago. (AP Photo/Hadi Mizban)
Iraqi anti-government protesters throw stones and trash at riot police during a demonstration in Baghdad Friday, Feb. 25, 2011. Thousands marched on government buildings and clashed with security forces in cities across Iraq on Friday, in the largest and most violent anti-government protests here since political unrest began spreading in the Arab world several weeks ago. (AP Photo/Hadi Mizban)
Iraqi anti-government protesters climb and push concrete blast walls leading to the heavily guarded Green Zone during a demonstration in Baghdad Friday, Feb. 25, 2011. Thousands marched on government buildings and clashed with security forces in cities across Iraq on Friday, in the largest and most violent anti-government protests here since political unrest began spreading in the Arab world several weeks ago. (AP Photo/Hadi Mizban)
Protesters clash with police in Baghdad, Iraq, Friday, Feb. 25, 2011. Thousands marched on government buildings and clashed with security forces in cities across Iraq on Friday, in the largest and most violent anti-government protests here since political unrest began spreading in the Arab world several weeks ago. (AP Photo/Hadi Mizban)
Iraqi anti-government protesters throw stones at riot police during a demonstration in Baghdad Friday, Feb. 25, 2011. Thousands marched on government buildings and clashed with security forces in cities across Iraq on Friday, in the largest and most violent anti-government protests here since political unrest began spreading in the Arab world several weeks ago. (AP Photo/Hadi Mizban)
Protesters sit on the ground in front of the provincial headquarters building in Kut, Iraq, Thursday, Feb. 17, 2011. On Wednesday about 2,000 stone-throwing demonstrators attacked local government offices, setting fire to some buildings, including the governor's house. (AP Photo/Hadi Mizban)
Iraqi protesters chant anti-government slogans in front of Kut's provincial headquarters building Thursday, Feb. 17, 2011. On Wednesday about 2,000 stone-throwing demonstrators attacked local government offices, setting fire to some buildings, including the governor's house. (AP Photo/Hadi Mizban)
An Iraqi soldier enters the damaged provincial headquarters building in Kut, Iraq, Thursday, Feb. 17, 2011. On Wednesday about 2,000 stone-throwing demonstrators attacked local government offices, setting fire to some buildings, including the governor's house. (AP Photo/Hadi Mizban)
