NEW YORK - CBS said Wednesday it is cancelling the Wednesday edition of "60 Minutes," insisting the decision was made because of poor ratings and not last fall's ill-fated story about President Bush's military service Dan Rather, the newsmagazine's lead correspondent, will contribute stories to the Sunday edition of "60 Minutes," said CBS Chairman Leslie Moonves. "This was a ratings call, not a content call," Moonves said Wednesday. The newsmagazine spinoff was where Rather reported last September that Bush skirted some duty while in the Texas Air National Guard and a commander felt pressure to sugarcoat an evaluation of him....