A video posted Tuesday on the Internet showed purported al-Qaida in Iraq militants beheading a man said to be an Iraqi security force member. A statement shown on the video identified the Iraqi National Guard member as Jassim Mohammed Hussein Mahdi, who appeared to be in his early 20s, and the black banner of al-Qaida in Iraq, which is headed by wanted Jordanian militant Abu Musab al-Zarqawi.Full Story