Law enforcement officials on high alert

A new threat assessment obtained by ABC News says the U.S. is facing its highest threat level perhaps since 9/11. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bitly.ws/35iTm WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bitly.ws/35c6s #lawenforcement #terrors #abcnews #worldnewstonight