In our efforts to battle terrorism and cyber attacks and biological weapons, all of us must be extremely aggressive. We must protect our people from danger and keep America safe and free.

I have never believed we had to choose between either a clean and safe environment or a growing economy. Protecting the health and safety of all Americans doesn't have to come at the expense of our economy's bottom line. And creating thriving companies and new jobs doesn't have to come at the expense of the air we breathe, the water we drink, the food we eat, or the natural landscape in which we live. We can, and indeed must, have both.

A man is more than the sum of all the things he can do.

I did attempt to find out if there were any secret government documents that revealed things. If there were, they were concealed from me too. And if there were, well I wouldn't be the first American president that underlings have lied to, or that career bureaucrats have waited out. But there may be some career person sitting around somewhere, hiding these dark secrets, even from elected presidents. But if so, they successfully eluded me...and I'm almost embarrassed to tell you I did (chuckling) try to find out.

The best example of all, to me, that our problems are both personal and cultural and political and social is the whole condition of the middle class economically.

Americans - not just starting thirty years ago but going back to the beginning, when we were rebelling against King George - we've always been of two minds about the government, which is why the framers wrote the Constitution the way they did.

Running helps me stay on an even keel and in an optimistic frame of mind.