We're at a real time of transition here in terms of future aviation. What's going to be manned? What's going to be unmanned? There are those who see [the JSF] as the last manned fighter/bomber. And I'm one that's inclined to believe it-whether it's right or not.

The best day was when we got bin Laden.

I think anybody in our - in the, in the national security apparatus has, has got to take full cognizance of their responsibility for the safeguarding of classified information.

If the untimely battlefield deaths of generations of American heroes have taught us nothing else, it should be this unalterable fact: what you do with your time here on earth is far more important than the time you had to do it. Those who live most are those who love most, who act the noblest and do their best.

We have to stop the killing. We need to let the refugees - we need to let Syrian citizens go home.

Let us all be men and women in full. Let us expect from ourselves more than we think we can give, more than we think we can do and more than we think we already know.

The single biggest existential threat that's out there, I think, is cyber.