Designing any new spacecraft requires relentless innovation. But sometimes the better part of innovation is not invention, but effectiveness. And therein lies the challenge for Orion, and for the engineers designing it. NASA and Lockheed Martin must find the discipline to produce a straightforward spaceship, with a clear mission and mature technology. And they must do it by 2015, with a total budget of only $8 billion--the equivalent of six weeks' expenses in Iraq.