Failure of the Security System

"There is no doubt that the failure of the security system in Iraq became very clear but who is responsible for this failure? Is it the multinational and US forces or the Iraqi Police and NG?

We have seen in the last few days that those who are planning to kill the Iraqis and destroy their services including the worship places like Churches and Shia Mosques are able to execute their plans as if there is no one to challenge or stop them at all."
hammorabi