And we remember the end of our combat mission and the emergence of a new dawn - the precision of our efforts against al Qaeda in Iraq, the professionalism of the training of Iraqi security forces, and the steady drawdown of our forces. In handing over responsibility to the Iraqis, you preserved the gains of the last four years and made this day possible.

No U.S. soldier ever dies in vain because they're carrying out the missions of their commander in chief. And we honor all the service that they've provided. Our troops have performed brilliantly. The question is for the next president, are we making good judgments about how to keep America safe precisely because sending our military into battle is such an enormous step.

This is the moment when we must come together to save this planet.

I'll go anywhere and I'll do whatever it takes to get this done. It's too important for Washington to screw this up. Now's the time for us to work on what we all agree to, which is let's keep middle-class taxes low. That's what our economy needs. That's what the American people deserve.

Everything we've done has been designed to make sure that we address that number one priority. That's what the sanctions regime was all about. That's how we were able to mobilize the international community, including some folks that we are not particularly close to, to abide by these sanctions. That's how these crippling sanctions came about, was because we [USA] were able to gain global consensus that Iran having a nuclear weapon would be a problem for everybody.

There wasn't a time where I felt fearful that I couldn't make the best decisions possible.

Iran is the latest expression of a deep, ancient, powerful culture that's different than ours. And we don't know how it's going to play itself out.