The U.S. and Russia say they're close to a major agreement on arms control. The world's largest nuclear powers are discussing extending the last remaining nuclear treaty, which is currently scheduled to expire in February, and freezing the total number of nuclear warheads. Nick Schifrin reports and talks to Marshall Billingslea, special presidential envoy for arms control, about the negotiations.
PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders