The Islamic State released a full-length version of the film “Flames of War: Fighting Has Just Begun”, praising its victories and warning the United States not to get in their way.

However, U.S. intelligence agency is mainly focused on one jihadist who appears at the end of the video and speaks perfect English with a North American accent. The officials analyze the video in order to identify the man’s origin.

“Clearly ISIS had a calculated step to be able to put this guy on camera,” said Frank Cilluffo,who is security analyst at George Washington University. “Why? Because he seems American. The message is aimed at a Western audience.”