As a former State Department negotiator, Richard Smith led negotiations on some of the most significant environmental and scientific agreements of the late and post-Cold War era. In his new book, "Negotiating Environment and Science: An Insider's View of International Agreements, from Driftnets to the Space Station," Smith discusses some of the precedents he and his teams established for dealing with today's environmental challenges. During today's OnPoint, Smith explains how the lessons learned during his time as a negotiator can be applied to next month's Copenhagen meeting. He also discusses the importance of U.S. leadership on environmental issues.