I will support Iraqis and Syrians fighting to reclaim their communities.

It is in the interests of all of us - the United States, China and the rest of the world - to make sure that the rules of the road are upheld. These rules and norms are part of the foundation of regional stability, and they have allowed nations across the region, including China, to grow and prosper.

Writing has been an important exercise to clarify what I believe, what I see, what I care about, what my deepest values are. The process of converting a jumble of thoughts into coherent sentences makes you ask tougher questions.

The elevation of appearance over substance, of celebrity over character, of short term gains over lasting achievement displays a poverty of ambition. It distracts you from what's truly important.

What we've said to the girls is: 'If you guys ever decide that you're going to get a tattoo, then mommy and me will get the exact same tattoo, in the same place.' And we'll go on YouTube and show it off as a family tattoo.

My particular worries on any given day - how I'm doing in the polls or what somebody is saying about me... for good or for ill - isn't particularly relevant. What is relevant is: What am I building that lasts?

Hunger, disease and poverty can lead to global instability and leave a vacuum for extremism to fill. So instead of just managing poverty, we must offer nations and people a pathway out of poverty. And as president I've made development a pillar of our foreign policy, alongside diplomacy and defense.