This means that diplomats are, in effect, stuck in the four-mile-square fortified Green Zone.
Al-Maliki cast his ballot in Baghdad's Al-Rasheed Hotel, in the highly protected and fortified International Zone.
Speaking through a translator at a news conference in the fortified Green Zone, government spokesman Ali Dabbagh condemned the act.
On Tuesday, Roh became the first South Korean leader to walk across the heavily fortified Demilitarized Zone between the two countries.
Traffic was banned from the area around the heavily fortified Green Zone, the headquarters of the Iraqi government and foreign diplomats.
Earlier on Sunday, Mr Obama visited some of the US personnel based at the the heavily fortified Demilitarised Zone (DMZ) which separates the two Koreas.
President Bush is going to see Iraqi Prime Minister Malaki, not in Baghdad, where even the heavily fortified Green Zone is no longer considered safe, but in Amman, Jordan.
Fitzsimons, Mr McGuigan and Mr Hoare had all been working for British security firm ArmorGroup, based in the Iraqi capital's fortified Green Zone, at the time of the shooting.
Mr Fitzsimons, Mr McGuigan and Mr Hoare had all been working for British security firm ArmorGroup, based in the Iraqi capital's fortified Green Zone, at the time of the shooting.
But the BBC's Natalia Antelava, in Baghdad, says Wednesday's bombs - within the heavily fortified Green Zone - have cast serious doubts on the ability of the country's security forces to defend its citizens.
One Blackwater operative told a reporter on a flight home from the Middle East that he had served as a bodyguard, escorting American personnel along the extremely dangerous road from Baghdad's airport to the fortified Green Zone downtown.
According to the American army, the bodyguard of Adnan al-Dulaimi, a prominent Sunni politician, was arrested just before he could carry out a series of bomb attacks in the heavily fortified Green Zone, where parliament and much of the Iraqi cabinet is located.
Entering and leaving the Green Zone, the fortified heart of the American presence, had become too risky.
And in the Age of Obama, with cleavages between liberals and conservatives growing ever wider in America, and with the future of the European Union hanging in the balance as the euro zone teeters on the edge of an abyss, the fact that Israeli society is becoming increasingly fortified is simply extraordinary.
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