How in the world did NBC News let its biggest star and face of its division run around America for more than ten years telling stolen valor lies, lie-lies, whoppers, white lies, exaggerations, and — if you want to be charitable — embellishments. Brian Williams didn’t just spew bald-faced lies from David Letterman’s couch. He lied repeatedly on the air at NBC News and its affiliates. He lied to NBC News legend Tim Russert. Stories Williams’ shared with NBC’s own Tom Brokaw both on the air and at Columbia Journalism school are now disputed. Things told to other reporters don’t...