PRESIDENT OBAMA: Here's my bottom line: America must always lead on the world stage. If we don't, no one else will. The military that you have joined is, and always will be, the backbone of that leadership. But U.S. military action cannot be the only "“ or even primary "“ component of our leadership in every instance. Just because we have the best hammer does not mean that every problem is a nail. And because the costs associated with military action are so high, you should expect every civilian leader "“ and especially your Commander-in-Chief "“ to be clear about how that awesome power should be used.