U.S. cites Russian treaty violations as cause for withdrawal

President Trump said Thursday he will begin withdrawing from a key post-Cold War agreement with Russia and more than 30 other nations. The Open Skies Treaty allows regulated overflights of Russia, the U.S. and Europe by Russian and American planes to ensure no military action is in the process of launching. Nick Schifrin talks to Marshall Billingslea, presidential special envoy for arms control.