Responsibility to protect is something that in international law we've tried to use, but it has to be used delicately when other sovereign states have interests at stake.
The responsibility to protect in North Korea is important, but how far we go and what we can do is significant as well. North Korea and South Korea have come to blows on occasion, and we need to deal with human rights in a way that doesn't create provocations on either side that will cause difficulties. I think it's an issue we have to work with, and we have to work carefully with other countries and through the United Nations.