Support WBURMoscow's Likely New Ambassador To U.S.: 'Tough' And 'Not That Easy To Work With'Play03:22Download AudioLucian KimJuly 19, 2017 ShareAnatoly Antonov smiles at an October 2016 briefing at Russia's Defense Ministry in Moscow. Antonov is "able to shift in a nanosecond from warmly charming to caustically sarcastic," says a former U.S. defense official. (AP)