By Steve LackmeyerBusiness writerslackmeyer@oklahoman.comThe bitter divorce between Oklahoma City's largest and oldest advertising agency, Ackerman McQueen, and the National Rifle Association now includes a new lawsuit demanding all history of their 38-year relationship be erased from the agency's website.The two sides are suing each other for more than $100 million over claims of breach of contract, false billings and questions of millions paid to NRA-TV personalities through Ackerman McQueen.Read more on NewsOK.com