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.

When it comes to Israel's security, our military and intelligence cooperation, that's off limits. That's protected. That's sacrosanct.

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

We're married. We are one now. There's no running away. We have to deal with things together and figure them out, and that's the greatest gift. I'm in it. People ask me, 'How do you maintain a relationship?' I don't know, but all I do know is that I chose Sara to be the one, and when I choose something, that's all that matters, and I'm totally in.

42% of our management team are women. So we've reset the goal to 50% by 2017. Because that's when Westpac becomes 200 years old as an institution - the oldest bank, and indeed the oldest company in Australia. So that's a lovely point to reflect on.

We must always refill and ensure there is a critical mass of leaders and activists committed to nonviolence and racial and economic justice who will keep seeding and building transforming movements.

All business leaders need to be technologists, as every industry now has a Netflix or an Uber on the horizon, threatening to upend business as usual. Apps are driving this disruption, and every enterprise needs to become an app company.