The climate change summit in Copenhagen six years ago was over-hyped and finally perceived as a failure. So, as almost 150 heads of state converge on Paris today, there's an effort to manage expectations. But despite many obstacles to international action, the sense of urgency is greater than ever.
Later on the program, the Islamic State may face defeat in Iraq and Syria. Could it retreat to a new headquarters across the Mediterranean Sea in the failed state of Libya?
Photo: Tafe Sa Tonsley