If in doubt, move decisions up to the President.

When you raise issues with the President, try to come away with both that decision and also a precedent. Pose issues so as to evoke broader policy guidance. This can help to answer a range of similar issues likely to arise later.

It is the photographs that gives one the vivid realization of what actually took place. (On photographs from Abu Ghraib prison.)

If in doubt, move decisions up to the President.

There's another way to phrase that and that is that the absence of evidence is not the evidence of absence. It is basically saying the same thing in a different way. Simply because you do not have evidence that something does exist does not mean that you have evidence that it doesn't exist.

The United States isn't going to do anything that it's not capable of doing. And if we do something, we'll be capable of doing it.

There are things that we know, and there are things that we don't know. Then there are the things that we don't even know that we don't know. Those are the things that are the hardest.