Donald Trump has no credibility to criticize me or my record or anything that I have done. If he had spent a minute in the deserts of Afghanistan or in the deserts of Iraq, I might listen to what he has to say.

None of us wants any more war.

It's not possible to put into words the sense of loss and grief that comes to a family that loses one of their children.

When we talk about carpet bombing ISIL, that's what it looks like, creating huge numbers of civilian casualties, which increases the numbers of refugees flowing out of the region, which increases the misery of the Syrian people.

The Russians haven't helped us at all in the fight against ISIS. When you total up the numbers of sorties that have been going into Syria, aircraft attacks, if you will, going into Syria, when the Russians said they were going to assist, we got a very small number of Russian sorties.

Afghanistan is going to be here a long time, and what's critical is that Afghanistan's relationship with its neighbors are, to the maximum extent they can be, constructive and operationally useful.

I seek as much as I can to mitigate risk.