A video showing the execution of an American hostage was posted on a website today, and the Islamic Army of Iraq claimed the victim was Jamestown, N.D., native Ronald Schulz. The video did not show Schulz’s face, the Associated Press reported, and it was impossible to identify him conclusively. The man was blindfolded, kneeling, with his hands tied behind his back and facing away from the camera when he was purportedly shot in the back of the head. As the execution was aired on the website, a separate piece of film on a split screen showed the footage of Schulz...