A U.S. Capitol Police officer is dead after a suspect rammed a car into a barricade and then exited the vehicle with a knife. Police opened fire and killed the suspect. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/31JcouI 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 #WilliamEvans #CapitolAttack