I can think about what [Mahatma] Gandhi said or [Martin Luther] King said about violence begetting violence, and still be true to my job by asking myself the question whenever we're confronted with a situation where some may be arguing for military action: Will this actually result in America being safer, or the most lives being saved?

Angela [Merkel] and I also agreed the need for a comprehensive and humane response to the devastating humanitarian crisis in Syria and for the influx of migrants and refugees from around the world. We need to build on the progress achieved at the U.N. Refugee Summit, which yielded new commitments from some 50 nations and organizations.

Our tears are not enough. Our words and our prayers are not enough. If we really want to honor these twelve men and women, if we really want to be a country where we can go to work and go to school and walk our streets free from senseless violence, without so many lives being stolen by a bullet from a gun, then we're gonna have to change. We're gonna have to change.

Of all the rocks upon which we build our lives, we are reminded today that family is the most important.

You bomb ISIL. You're not trying to bomb innocent people. And that requires intelligence and confidence in our military to be able to develop the kinds of targets that we need. We're already doing Special Forces, who are going to help us gather that intelligence and help advise and assist and train local forces so that they can go after ISIL in areas like Raqqah and Mosul.

My job is to communicate to the American people that the Muslim world is filled with extraordinary people who simply want to live their lives and see their children live better lives. My job to the Muslim world is to communicate that the Americans are not your enemy. We sometimes make mistakes. But if you look at the track record America was not born as a colonial power, and that the same respect and partnership that America had with the Muslim world as recently as 20 or 30 years ago, there's no reason why we can't restore that. And that I think is going to be an important task.

I happen to be a proponent of a single-payer universal health care plan.