There will be boots on the ground if there's to be any hope of success in the strategy.

What I know concerns me. What I don't know concerns me even more. What people aren't telling me worries me the most.

Some people have said, in so many words, that I'm kind of wooly-headed in believing that the Iranians would see not having nuclear weapons as more in their security interest than not.

I think Donald Trump has gotten China's attention to a degree that his predecessors have not that this is a very serious matter for the United States.

I had no difficulty as Secretary of Defense moving from the Bush administration to the Obama administration.

I read in the press, and therefore it must be true, that no secretary of defense had ever been quoted as arguing for a bigger budget for State.

No policy has proved more successful in making friends for the United States, during the cold war and since, than educating students from abroad at our colleges and universities.