It was right to overthrow Saddam Hussein. It was the regime itself that was a threat. I think in hindsight, what I would have done is turn authority back over to Iraqis much more quickly and say: "Your country, you figure out how to run it."

There's no such thing as the United Nations.

Iran is barely over 50% Persian, and Arabs, Baluchis, Azeris, Kurds and many other groups feel left out of the society. That regime has a lot more weaknesses than people see.

Just like Sept. 11, only with nuclear weapons this time, that's the threat. I think that is the threat. I think it's just facing reality. It's not a happy reality, but it's reality and if you don't deal with it, it will become even more unpleasant.

The solution to North Korea is the reunification of the Korean Peninsula. China could influence the North; it supplies 80 to 90 percent of North Korea's energy. The United States have to put pressure on China in order for China to pressure North Korea.

I think the regime in North Korea is more fragile than people think. The country's economic system remains desperate, and one thing that could happen for example would be under a new government in South Korea, to get the South Korean government to live up to its own constitution, which says any Korean who makes it to South Korea, is a Korean citizen. A citizen of the Republic of Korea. And you could imagine the impact that would have inside North Korea if people thought, "If I could get out and make it to South Korea, I could have a different life."

Our biggest national security crisis is Barack Obama.