President Obama has made the Asia Pacific region a focus of his foreign policy, and Vietnam - a large, growing economy in the heart of Southeast Asia - is critical to those efforts.

I think one of the critiques of me is that I thought I knew it all. But I was learning from the enormous resources available within the U.S. government who have a very different view of the world than many of the people commenting on foreign policy from outside of the government.

Talking and diplomacy is often seen as a concession in America, in a way that it is not in other places.

We don't have to kind of be in cycles of conflict if we can find other ways to resolve these issues. We can do things that challenge the conventional thinking that, you know, 'AIPAC doesn't like this,' or 'the Israeli government doesn't like this,' or 'the Gulf countries don't like it.' It's the possibility of improved relations with adversaries.