Fox News' Lucas Tomlinson joins 'Fox News Live' to discuss an ISIS killing of two U.S. army soldiers and one interpreter in Syria during a 'key leader engagement.' Secretary of War Pete Hegseth confirmed the attacker has been killed by partner forces. Don’t just watch Fox News—be part of it. Become a Fox News Patriot today. https://youtube.com/foxnews/join Subscribe to Fox News: https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.