Finally, there are those who oppose identifying a time frame for our transition to Afghan responsibility. Indeed, some call for a more dramatic and open-ended escalation of our war effort -- one that would commit us to a nation-building project of up to a decade. I reject this course because it sets goals that are beyond what can be achieved at a reasonable cost, and what we need to achieve to secure our interests. Furthermore, the absence of a time frame for transition would deny us any sense of urgency in working with the Afghan government. It must be clear that Afghans will have to take responsibility for their security, and that America has no interest in fighting an endless war in Afghanistan.