attack, are digging their own graves in the very place where they were stationed. CNN can not independently verify that the men in the video were soldiers, as the propaganda video claims. How the Islamic Stateis run, from oil to beheadings The video then shows a group of militants executing the men, who fall into the ditch. The man who committed this atrocity on film could be an Arab who was educated in the West. Or he could be an American or Canadian. If so, Cruickshank said, he would be the first North American jihadist to commit a war crime on camera. Clearly ISIS had a calculated step to be able to put this guy on camera, said Frank Cilluffo, a security analyst at George Washington University. Why ? Because he seems American. The message is aimed at a Western audience. The intent, Cilluffo told CNN, is to project fear to Americans, and to project power. The difference between ISIS and al Qaeda Intelligence officials will sift through every detail of the man's voice, looking for any clues of a particular dialect that might lead investigators to local communities to seek additional clues, Cilluffo said. The U.S. will also compare the clues of the jihadist's language to see whether it is consistent with those individuals who are known to have gone to fight for ISIS. The video is undoubtedly propaganda and a recruitment piece for the terrorist group, Cruickshank said. But