It was President [Bill] Clinton and the United States congress in 1998 which said that the regime has to be changed because the regime would not give up its weapons of mass destruction. We came into office in 2001 and kept that policy because Saddam Hussein had not changed.

You have to comply, you have to obey - or you'd better resign and leave. But that is also the mark of a great leader - somebody who, in the presence of inner conflict, will do the right thing.

You should see what our Founding Fathers used to say to each other and in the early part of our nation. But what they were able to do, especially in Philadelphia in 1787, four months, they argued about what a House should be, what a Senate should be, the power of the president, the Congress, the Supreme Court. And they had to deal with slavery.

Don't let your ego get too close to your position, so that if your position gets shot down, your ego doesn't go with it.

Leaders have followers. The primary role of a leader is to convey to those followers a sense of purpose, vision, and mission.

We all hoped in 2001 that we could put in place an Afghan government under President Karzai that would be able to control the country, make sure al-Qaeda didn't come back, and make sure the Taliban wasn't resurging. It didn't work out.

Have a vision. Be demanding.