You could be in the United Nations office all night every night and still feel like you were not making a sufficient dent in the world's problems. I think the key is prioritization. But every job presents the tyranny of the inbox, of allowing the urgent to crowd out the important. So we have to have our lodestars.

I think that the only time we will really know what then-President Trump is going to do about the set of challenges that confront him is after he has sat down with his advisers as the commander in chief, when he's looking at the threats and the intelligence from the standpoint of being the number one decider, when he's hearing from his secretary of defense, his chairman, who was the same chairman President Obama had, Chairman Joe Dunford, who is an outstanding public servant, who has led our anti-ISIL effort, on which we're making great progress.

Every working mother struggles with the BlackBerry, knowing the boss can call.

My second epiphany came as an intern at the Carnegie Endowment for International Peace. The man I worked for was consumed with what was going on in Bosnia. And the more I knew [about it] the more saddened I was. There were these images of emaciated men behind barbed wire.... It was like, I've got to find a way to do something.

I like to think that as I get older I'm getting better at spending time with people who have qualities that make them worth spending time with.

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.

I got into journalism not to be a journalist but to try to change American foreign policy. I'm a corny person. I was a dreamer predating my journalistic life, so I got into journalism as a means to try to change the world.