The goal that we seek is achievable, and can be expressed simply: No safe haven from which al Qaeda or its affiliates can launch attacks against our homeland or our allies. We won't try to make Afghanistan a perfect place. We will not police its streets or patrol its mountains indefinitely. That is the responsibility of the Afghan government, which must step up its ability to protect its people, and move from an economy shaped by war to one that can sustain a lasting peace. What we can do, and will do, is build a partnership with the Afghan people that endures -- one that ensures that we will be able to continue targeting terrorists and supporting a sovereign Afghan government.