The fact that there were discreet channels of communication established with Iran in 2012 is something that we confirmed publicly. However, we did not have any serious prospect of reaching a nuclear deal until after the election of Hassan Rouhani in 2013. Yes, we had discussions with the Iranians before that, but they did not get anywhere.
I found people I really wanted to work for; I made myself available to do whatever I could with the skills I had; I took some risk, packing up and moving to Chicago; and I looked for the opportunities that fit for me. So I think the biggest advice is to find people you love to work for who you're going to learn from.
There's this constant narrative of anxieties: Is the U.S. in decline? Is China rising? People forget... no other country is trying to play the role we play. They're not signing up to be responsible for security in the Middle East, responsible for the global economy, responsible for enforcing international norms.