Despite Russian and Serbian opposition, UN Secretary-General Ban Ki Moon said Friday the UN would gradually cede its role.
Iraqi troops took the southern city without a shot being fired from Shiite cleric Moqtada al-Sadr's Mahdi Army.
At a rare meeting Sunday, some oil-producing nations tried to stabilize prices – and Western concerns over a recession.
But short-term pressures may keep them up for a while.
Military analysts say the Islamic Republic would strike back in unconventional ways – targeting American interests in Iraq and Afghanistan.
The military blamed a little-known Shiite cell leader for Tuesday's attack in the Shiite neighborhood of Hurriyah that killed at least 63 people.
The UN High Commissioner for Refugees estimates 67 million displaced people worldwide in 2007, a result of war, poverty, and climate change.
Some US experts worry that a smuggling ring gave rogue states plans for a light warhead, apparently from Pakistan.