My job to the Muslim world is to communicate that the Americans are not your enemy. We sometimes make mistakes. We have not been perfect.

Maybe you could be a great writer - maybe even good enough to write a book or articles in a newspaper - but you might not know it until you write that English paper - that English class paper that's assigned to you.

The future belongs to young people with an education and the imagination to create.

Throughout American history, there have been moments that call on us to meet the challenges of an uncertain world, and pay whatever price is required to secure our freedom.

Part of what's changed in politics is social media and how people are receiving information.

The biggest threat that we face right now is not a nuclear missile coming over the skies. It's in a suitcase. This is why the issue of nuclear proliferation is so important. It is the - the biggest threat to the United States is a terrorist getting their hands on nuclear weapons.

Cynicism is a sorry kind of wisdom.