We all know the war in Iraq has not gone well. We have made mistakes and we have paid grievously for them. We have changed the strategy that failed us, and we have begun to make a little progress. But in the many mistakes we have made in this war, a few lessons have become clear. America should never undertake a war unless we are prepared to do everything necessary to succeed, unless we have a realistic and comprehensive plan for success, and unless all relevant agencies of government are committed to that success. We did not meet this responsibility initially. And we must never repeat that mistake again.