(CBS) NEW YORK -- Dan Rather is leaving CBS after 44 years with the Tiffany Network. Sean McManus, president of CBS News and Sports, made the announcement. "Of all the famous names associated with CBS News, the biggest and brightest on the marquee are Murrow, Cronkite and Rather," McManus said. "With the utmost respect, we mark the extraordinary and singular role Dan has played in writing the script of not only CBS News, but of broadcast journalism." CBS News is working on a primetime special on the newsman's career. It is scheduled to be broadcast sometime this fall. CBS News...