A wild and crazy weekend involves sitting on the front porch, smoking a cigar, reading a book.

Every time we have come to the end of a conflict, somehow we have persuaded ourselves that the nature of mankind and the nature of the world have changed on an enduring basis and so we have dismantle our military and intelligence capabilities. My hope is that as we wind down in Iraq and whatever the level of our commitment in Afghanistan, that we not forget the basic nature of humankind has not changed.

You know, if I were an - if I were a Taliban, I'd say, 'What did al-Qaida ever do for me except get me kicked out of Afghanistan?'

I think when it comes to the issues, I'd advise him to stick to the script. But, I mean, Donald Trump is going to have some very tough conversations and he's going to be talking about some very tough and complicated issues in all of the places that he visits.I think anytime a president does things that are humanizing, I think it's - it's good.

Most governments lie to each other. That's the way business gets done.

I had no difficulty as Secretary of Defense moving from the Bush administration to the Obama administration.

Well, I've ruffled a few feathers at all the institutions I've led. But I think that's part of leadership.