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Tara Cowan of Euless, Texas, a member of Open Carry Tarrant County, poses for a portrait with a Saiga 556 rifle as she and members of the group Open Carry Tarrant County gathered for a demonstration, Thursday, May 29, 2014, in Haltom City, Texas. North Texas gun rights advocates are suing the city of Arlington for amending an ordinance that they claim is discriminatory and infringes upon free speech rights, in the latest sign of growing tensions among gun activists and government forces in Texas. (AP Photo/Tony Gutierrez)