Remind me why we're there again?

From today's excellent Anthony Gregory article, I was led to the following article: U.S. Blood Is Not Buying a Free Iraq -- with this killer quote:

'It may be the ultimate irony,' commented Ambassador Galbraith, 'that the United States, which, among other reasons, invaded Iraq to help bring liberal democracy to the Middle East, will play a decisive role in establishing its second Shiite Islamic state.'