In Britain, you do your job. When you do an American TV show, there is a sense of being one with the crew, and there is a leadership element, which was a learning curve for me because it is very different culturally. In Britain, you just do it, leave and say, 'Thanks.'

The very essence of leadership is that you have to have vision. You can't blow an uncertain trumpet.

We have treated our most serious adversaries, such as Iran and North Korea, in the most juvenile manner - by giving them the silent treatment. In so doing, we have weakened, not strengthened, our bargaining position and our leadership.

Leadership Quotes