Officials conduct a controlled release of a highly-flammable chemical on the train in the hopes of avoiding a massive explosion. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/3mscXkB 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 #WorldNewsTonight #toxic #explosion #ohio