From Richard Holbrooke - and I miss him every day - I learned two things. One, prioritization: Never take your eye off the longer-term reforms. The other thing is, he was a hell of a schmoozer! So I should take advantage of my Irish love of beer and gift of the gab, and build relationships. That's a cherished part of the job, asking someone, "How did you get to be the Rwandan ambassador?" I try to take advantage of the fact that I hope to be here at least until the president's term ends getting to know my colleagues.

We have an interest in combating tactics in war that are abhorrent and that only fuel terrorism because they incite people on the ground.

We, as Americans, have an interest in ensuring that the only people who get to vote for our elected leaders are our citizens, and not some foreign people who think that they have an interest in skewing our election in one direction or another.

My kids are my salvation.... It's a delight to walk in and get charged by a five-year-old and a two-year-old. That'll make you forget the darkness.

When it came to the Vietnam War, Mr. McNamara was an early advocate of escalation but came to realize the flaws in the American approach earlier than many of his colleagues. Yet in public, he continued to defend the war.

As a journalist, I've felt as if it's a privilege that people share their stories and want you to be the messenger.... Even in my current job, when I go abroad, I'm racing to get back to the president and the secretary to share what I've seen.

If you represent everyone, in some ways you represent no one. You're un-owned.