It's hard to anticipate. I can tell you what I'm feeling right now is that I'm busier than I expected these last two weeks. A great deal of emotion around the people that I've worked with and the gratitude I feel for the sacrifices they've made on behalf of the American people, but also on behalf of me personally.

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.

We've seen those results in generations of Muslim immigrants - farmers and factory workers, helping to lay the railroads and build our cities, the Muslim innovators who helped build some of our highest skyscrapers and who helped unlock the secrets of our universe.

Don't get cynical. Don't ever think you can't make a difference.

We remember the surge and we remember the Awakening -- when the abyss of chaos turned toward the promise of reconciliation. By battling and building block by block in Baghdad, by bringing tribes into the fold and partnering with the Iraqi army and police, you helped turn the tide toward peace.

In a summer marked by instability in the Middle East and Eastern Europe, I know the world also took notice of the small American city of Ferguson, Missouri - where a young man was killed, and a community was divided. So yes, we have our own racial and ethnic tensions.

John McCain likes to say that he'll follow bin Laden to the Gates of Hell - but he won't even go to the cave where he lives.