In this Aug. 1, 2019 photo Nena Hermosillo stands outside her taco truck in Cheyenne, Wyo. Cheyenne-based Taco John's, which has nearly 400 locations in 23 states, recently sent Freedom's Edge Brewing Co. in Cheyenne a cease-and-desist letter for using "Taco Tuesday" to advertise the taco truck parked outside on Tuesdays. Taco John's has owned the trademark to "Taco Tuesday" since 1989 and calls the term part of its "DNA." Some say the term has become so common that Taco John's can't legitimately continue to claim it. (AP Photo/Mead Gruver)
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