whenever i'm in china, when sixon was in china, and every president i've known, we are # aware of individual cases in which human rights are violated. we talk to the chinese on a private basis often, and so about it so there's no disgrement about the importance of human rights or the role of america. there is a disagreement on whether they should be done based by a public demonstration or by diplomacy. >> host: we just have a few minutes left, dr. kissinger, and when you look at the geopolitical land scape today, when you survey the world, what worries you the most? what are the threats looming out that there concern you the most? >> guest: what worries me is that you have upheavals in every part of the world happening all of the time continuously without any really clear guiding principles of where they're going to go. it's one thing to say to be very enthusiastic and like the arab spring, but no one knows the heat of revolutions is not the day on which they occur, but in the period in which they are being sorted out. on the technical level what worries me is the spread of nuclear weapons,