Is The United States Presence in Iraq Justified?

The US presence in Iraq is not justified. I think that because I think US going to war with Iraq wasn't justigied. The Bush administration argued on the subject of Weapons of Mass Destruction and used it for one reason of going to war. But I think there was a lack of proof and even currently, there hasn't been hard evidence of Weapons of Mass Destruction found in Iraq. But hey, it's already happened. No use arguing about that. But still, I think US should be responsible for the aftermath of the war in Iraq and work to reconstruct Iraq.
So! US should occupy Iraq until that government has enough people and is stable to handle Iraq and support itself economically and socially.…