keywords: beheading armstrong hostage zarqawi ap
text: Video on Web Site Shows Beheading of Man (AP) AP - A video posted Monday on a Web site showed the beheading of a man identified as American civil engineer Eugene Armstrong. The militant group led by Abu Musab al-Zarqawi claimed responsibility for the slaying and said another hostage  #151; either an American or a Briton  #151; would be killed in 24 hours.