"CBS Evening News" anchor Dan Rather has decreed that the video showing al-Qaida terrorists beheading American contractor Nick Berg will not be shown in its entirety on his network, though the network has had no such problem in the past broadcasting other grisly images. Reports the Web site dedicated to monitoring Rather's broadcasts, RatherBiased.com: "The decision - made first by the staff of the CBS Evening News, including managing editor Dan Rather - now an official news division policy, came on the same night [Tuesday] that the network announced it was going to air footage of an American casually talking...