Ukrainian ambassador to US on Putin’s nuclear weapons comments: ‘He is a threat’ 

Oksana Markarova, Ukraine's ambassador to the U.S., weighed in on Russian President Vladimir Putin’s remarks about nuclear weapons, saying “he is a threat” that should be taken at his word.  Markarova joined CBS News’s “Face the Nation” on Sunday, where host Margaret Brennan asked what she made of Putin’s recent comment about how he hopes...