That sense of what happened in Europe in World War II has shaped a lot of my views.

You cant win if youre chasing the wrong problem.

Iraq has no history of ethnic conflict.

I certainly think it's important to speak up and say how unacceptable Donald Trump is. I'm always more than willing to do that.

I think Obama sees everything through one lens. Doing nothing in the face of the slaughter in Syria is not only shameful, it is unrealistic. This approach leaves Syria as a broken country and a breeding ground for extremists for decades.

NATO is still the most remarkable alliance in history. It stuck together through 40 years of Cold War, and it then joined together to fight in Afghanistan. In the 1980s, I would not have thought this was going to be possible.

People change their habits. I know Americans who don't go to Paris because they think it is too dangerous.