By Steve LackmeyerBusiness writerslackmeyer@oklahoman.comThe NRA is cutting ties with its longtime advertising agency Ackerman McQueen and is also ending operations at NRATV. The Oklahoma City firm has worked with the National Rifle Association for 38 years, but that relationship imploded over the past few months with lawsuits filed by both sides alleging fraudulent billings, betrayal, blackmail and lies.Read more on NewsOK.com