As the world's leaders gather in Paris to discuss climate change, one of the many issues that's sure to be brought up is the relationship between climate change and violence. At home, it's a hot political issue, with presidential candidate Bernie Sanders going so far as to say that climate change is directly related to the growth of terrorism. The director of the Center for Climate and Security joins Kathleen to discuss what we know about the link between climate change and violence, and how it might play out in the future as the world is expected to get hotter.