Nations, great nations have limitations. All nations have limitations. Even great powers have limitations.

Iraq was a war of choice, like Vietnam.

And this - this board was - was impanelled in 1951. And it's gone through ups and downs in how the secretaries have used it. But I have put a premium on that advisory board.

There's always a balance, I think, any administration has to find in not just the military but in any agency of government.

This is eventually how Syria will be resolved - through a political settlement.

I would not trade America's position in the world - our ledger, our debts and assets - for any country in the world. There isn't a country in the world even close to America.

I am fully supportive of 'open service' and committed to LGBT military families.