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.

What is most needed in Darfur is an international peacekeeping and protection presence, and this is what the Sudanese government most wants to avoid.

When I wake up in the morning, I think about Syria.

Without investing in the rule of law for the poor, none of the other investments we make will be sustainable.

I was interning in the CBS sports affiliate in Atlanta with Robin Roberts.... I was taking notes on a Braves-Padres game, and on the live feed came footage of these kids protesting and getting crushed during the Tiananmen Square uprising in China in 1989. In that moment I became like a lot of young people in this country today, horrified and inspired but confused as to what I might do.

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 happen to miss the Constitution; I thought it was a good document.