Bush and Cheney love to talk about the War on Terra lasting for generations. Plus, Bush has discovered the "mission" of the United States in his copy of the Constitution.
We're a nation with a mission, and that mission comes from our most basic beliefs. We believe that freedom is the right of every single person in the world. By the unselfish dedication of Americans in uniform, people in our own country and in lands far away, people can live in freedom and know the peace that freedom brings.
http://www.whitehouse.gov/news/releases/2004/02/20040217-5.html I have an old copy of the Constitution and it doesn't include the part about the mission of the United States being to bring freedom to everyone on earth. This is an admirable goal, but I do not think most people, including those in the military, want to spend American lives and money on it.