I remember classes in college where the professor was espousing certain theories about how blacks were inherently less intelligent. But I learned a long time ago to give people the benefit of the doubt, not to assume that somebody was reacting to you because of race.

Search for role models you can look up to and people who take an interest in your career. But here's an important warning: you don't have to have mentors who look like you. Had I been waiting for a black, female Soviet specialist mentor, I would still be waiting. Most of my mentors have been old white men, because they were the ones who dominated my field.

I think our dependence on foreign oil is a real problem, potential Achilles heel, and we have to do something about it.

My favorite quote is Thomas Jefferson`s "The God who gave us life gave us liberty at the same time." Well, he was a slave-owner. But these institutions, while they weren't perfect at the time, did allow people to prosper and to continue to struggle and build toward them. That's what you need, is good institutions and I think people will eventually live up to them.

The United States has no credible evidence that Iraq moved weapons of mass destruction into Syria early last year before the U.S.-led war that drove Saddam Hussein from power.

It has been hard to muster the resources to support fledgling democracies and to intervene on behalf of the most desperate. The AIDS orphans in Uganda, the refugee fleeing Zimbabwe, the young woman who has been trafficked into the sex trade in Southeast Asia. It has been hard, yet this assistance together with the compassionate work of private charities, people of conscience and people of faith, has shown the soul of our country.

We can't rely - or no country can rely on just a single personality to carry it forward. And so what the American founding fathers understood was that institutions were built for human imperfection not human perfection.