What will be the most effective forums for international cooperation in regulating the global commons, and what leadership role should the United States play on these issues? What are the prospects f…

Watch Senator John Kerry (D-MA) discuss climate change as a U.S. national security threat and the opportunity for the United States to pursue global leadership on the issue.

RICHARD SALOMON:  Good afternoon.  Can I get your attention, please?  It's a pleasure for me to welcome Senator Kerry and all of you to today's program at the Council on Foreign Relations.Before I i…

Experts discuss Dilma Rousseff’s impeachment trial, Brazil’s deepening economic recession, the Zika virus outbreak, and other issues facing Brazil as the country prepares to host the 2016 Summer Olym…