No matter what age people are, I hope the lesson is to be engaged. Understand what your government is doing. Follow them. Ask questions. There is a price to be paid for speaking truth to power, but you can live through it.

I think a nuclear detonation is society-altering in ways that other attacks, even as horrific as 9/11, are not. This isn't because we have power-hungry political leaders, but I think it might be demanded by the people themselves out of fear.

I really believe that even with all of our problems, we're still the best nation in the world. The idea of the United States is why millions of people want to come here every year. The reality is sometimes different, and we certainly have many things to fix, but I really believe that we have in our national DNA the ability to be a great nation that leads the way to progress.

The Cold War has ended. It's very simple. We are no longer living in a bipolar world. The chances that we will go to war with Russia are pretty much ended. Mutually Assured Destruction was a doctrine that worked very well for decades as a deterrent, but the world has fundamentally changed.

No matter what age people are, I hope the lesson is to be engaged. Understand what your government is doing. Follow them. Ask questions. There is a price to be paid for speaking truth to power, but you can live through it.

The emergent terrorist threats and the spread of nuclear technology and materials have made it much more likely that terrorists will get their hands on a nuclear weapon and that just changes the whole calculus. I love the quote by Rev. Richard Cizik: "If you've never changed your mind about anything, then pinch yourself, you might be dead." The world has changed and we need to start talking about this.

Young people in college were not even born when the Berlin Wall fell, and so they are not really cognizant of the Cold War and what that meant. Now, truly, the genie is out of the bottle and you have the possibility that terrorists ... could be stealing a bomb or buying a bomb