What role should the UN play in Iraq?

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The UN aims to broaden its activity in support of Iraq, Secretary General Ban Ki-moon has said. Is this a positive step forward? Mr Ban said the time for determined action in Iraq had come, but that a greater UN presence would need better security. The UN withdrew most of its staff in 2003 after a bomb killed its top envoy and 21 others but Iraqi PM Nouri Maliki says he can now guarantee UN security. The secretary general said there would be a new "regional support office" in Baghdad to foster dialogue between involved countries and an office in the southern city of Basra was also being considered. What role should the UN play in Iraq? How influential is the UN in this situation? What difference will this announcement make? Send us your comments.