I've been very lucky to have had a supportive family, a great education, enormous opportunity and challenge.

I think it's very, very important that in foreign policy and national security decision making, as in any other realm, that there be a range of diversity that reflects the full complexity of America. We should draw on those experiences to inform our decision making.

I am blunt sometimes; I am diplomatic sometimes; I am all things in between. Abrasive, you know, I guess it's in the eye of the beholder.

Thirty years ago, about 80% of a company's assets resided in its plant and equipment, with 20% in the knowledge of its people. Today, the reverse is true. The knowledge of our staff is our principal asset

We are safer if there are not nuclear arsenals around the planet that can be utilized, stolen, sold to terrorists and others who would do harm.

President Obama is funny, he's thoughtful, he's challenging, he's fun to work with - and it's been an extraordinary privilege.

Since I've had a career, my hair has been more or less professional.