That is the difference we make in the world. And our own safety, our own security, depends upon our willingness to do what it takes to defend this nation and uphold the values that we stand for - timeless ideals that will endure long after those who offer only hate and destruction have been vanquished from the Earth.

I've always wanted to come to Greece.

Alongside my own deep personal faith, I am a follower, as well, of our civic religion. I am a big believer in the separation of church and state.

What I want to communicate is the fact that in all my travels throughout the Muslim world, what I've come to understand is that regardless of your faith - and America is a country of Muslims, Jews, Christians, non-believers - regardless of your faith, people all have certain common hopes and common dreams.

That may prevent us from getting a deal done, It is there to be had. Whether ultimately Iran can seize that opportunity - we will have to wait and see, but it is not for lack of trying on our part.

There is a reason why George Washington is always one of the top three presidents, and it's not because of his prowess as a military leader; it's not because of the incredible innovations in policy that he introduced. It's because he knew when it was time to go.

We've persevered because of a belief we share with the Iraqi people - a belief that out of the ashes of war, a new beginning could be born in this cradle of civilization. Through this remarkable chapter in the history of the United States and Iraq, we have met our responsibility. Now, it's time to turn the page.