I've worked for four presidents and watched two others up close, and I know that there's no such thing as a routine day in the Oval Office.

After 9/11 we were prepared to use military force. We were prepared to go after not only the terrorists, but those who sponsor terror and provide sanctuary and safe harbor for them. We were prepared to use our intelligence assets the way we would against an enemy that threatened the United States itself, to put in place, for example, things like the Terror Surveillance Program and to have a robust interrogation program on detainees. Those are the acts you take when you feel you're at war and that the very existence of the nation is threatened.

And the fact of the matter is there were thousands of people that went through those training camps in Afghanistan. We know they are seeking deadlier weapons - chemical, biological and nuclear weapons if they can get it.

If we have reason to believe someone is preparing an attack against the U.S., has developed that capability, harbours those aspirations, then I think the U.S. is justified in dealing with that, if necessary, by military force.

Oil remains fundamentally a government business. While many regions of the world offer great oil opportunities, the Middle East with two-thirds of the world's oil and the lowest cost, is still where the prize ultimately lies, even though companies are anxious for greater access there, progress continues to be slow.

I've been criticized because I've had the temerity to speak out and done a couple of interviews since I left office. I don't find anything surprising about that. I don't say - I've been careful not to get personal in terms of my criticisms for my comment, but I think the issues are simply too important for the future of the nation for us to operate as though those of us who disagree somehow shouldn't speak out and be heard. I think we need to be heard.

I think you can not be blown off course by the fluctuations in the public opinion polls.