Historically - when you look at how America has evolved, typically we make progress on race relations in fits and starts. We make some progress, and then there's maybe some slippage.

Ironically, the single thing that has strengthened Iran over the last several years has been the war in Iraq. Iraq was Iran's mortal enemy. That was cleared away. And what we've seen over the last several years is Iran's influence grow. They have funded Hezbollah, they have funded Hamas, they have gone from zero centrifuges to 4,000 centrifuges to develop a nuclear weapon.

No one built this country on their own. This nation is great because we built it together.

I'm confident that America's foreign policy rebalance to the region will endure beyond my presidency because it's in the national interest of the United States.

As president of the United States, I don't bluff.

International inspectors are on the ground and Iran is being subjected to the most comprehensive, intrusive inspection regime ever negotiated to monitor a nuclear program. Inspectors will monitor Iran's key nuclear facilities 24 hours a day, 365 days a year. For decades to come, inspectors will have access to Iran's entire nuclear supply chain. In other words, if Iran tries to cheat - if they try to find build a bomb covertly, we will catch them.

You have social media and the Internet and immigration and so, suddenly, cultures are clashing and people feel as if they're less familiar with the people around them. That causes social anxieties.