Was the war in Iraq worth all that?

From Der Spiegel:

America's war in Iraq lasted seven years, longer than its war against Adolf Hitler. The Iraq war has claimed the lives of 4,426 US soldiers and about 100,000 Iraqi civilians. Now DER SPIEGEL, the New York Times the Guardian and other media have been given access to almost 400,000 documents compiled by the website WikiLeaks: the war logs of soldiers in the US military. According to an initial analysis of these documents, the number of dead is even higher than previously believed.
What was the outcome of this war? Iraq is rid of a tyrant. Today Iraqis can vote for their leaders, and millions have already made use of this right.
But for this war the United States violated international law, vilified allies and mocked the United Nations. It squandered its authority as a military and moral superpower. It spent more than $1 trillion (€720 billion). It was triumphant at first, but then it gave up hope for a moment and allowed terrorists to push it to the brink of an historic defeat. Then it rallied once again -- not to emerge victorious but to avert defeat, a strategy that resulted in many, many casualties.
Was it worth it? Does the outcome justify this war?

The title of Spiegel's report answers this question: "A Dumb War"

Maybe things will turn out well. Everything is possible in this devastated country. The interpreter fidgets with his mobile phone and wipes his forehead. Then he shouts out the words he has been wanting to say all along: "You can leave again, but we have to stay behind."