There is no military solution to the challenges of Syria.

ISIS is on its way to defeat but terrorism threat persists.

I just don't know whether it was all destroyed years ago - I mean, there's no question that there were chemical weapons years ago - whether they were destroyed right before the war, (or) whether they're still hidden.

I'm living the dream.

The Islamic State fighters in Mosul are dead men walking and I think they increasingly know it.

Don't forget Yemen, where there are also extremist elements, as we saw recently.

The president and I sat down in the Oval Office, and he expressed very clearly that what he wants from me is my best professional military advice.