Ukrainian President Volodymyr Zelenskyy said that Russia controls a fifth of the country as the U.S. military has begun training Ukrainian troops on an advanced multiple rocket system. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/3uHCDO5 WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bit.ly/3iQLwPp #ukraine #zelenskyy #russia #troops