'The Burden' filmmaker discusses climate, security debate as international tensions mount

Does climate change pose the greatest threat to the United States' national security, as presidential candidate and Sen. Bernie Sanders (I-Vt.) recently suggested? During today's OnPoint, Roger Sorkin, writer and director of "The Burden: Fossil Fuel, the Military and National Security" and a fellow with the Truman National Security Project, discusses his research and interviews with current and former military officials on the growing concerns surrounding climate change as a "threat multiplier."