Just when you thought the legal battle between the city and the San Antonio Professional Firefighters Association was over, another is beginning. The union has filed a lawsuit, challenging the city's enforcement of "free speech zones." The particular location is the free speech zone at the Semmes Branch Library on Judson Road. That's where firefighters first called attention to the issue in March. The union said the free speech zone is 288 feet away from the front door of the library and prevented union members from getting signatures for the union's petition.The city has responded to the lawsuit, saying the purpose of free speech zones is to give library guests and voters space from people engaging in political activity.