Dan Rather is coming to your local movie theater. At least the story behind why he’s no longer at CBS is. In “Truth,” Robert Redford plays Rather. Cate Blanchett plays his CBS producer Mary Mapes. In 2004, Rather reported that President George W. Bush’s powerful father arranged to keep his son in the National Guard to prevent serving in Vietnam. The report caused such hoo-hah that a treasured 24-year anchorman lost his job. Dan: “I’ve read the script. It’s serious. People behind it do a good job. It’s two great actors. You couldn’t want for a better cast. Redford playing...